Handling page scroll & Actions & Slider bar using selenium

package linkedIn_Interview;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

import javax.imageio.ImageIO;

import org.openqa.selenium.By;
import org.openqa.selenium.JavascriptExecutor;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.interactions.Actions;
import org.openqa.selenium.support.ui.Select;
import org.testng.Assert;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;
import org.openqa.selenium.OutputType.*;

import ru.yandex.qatools.ashot.AShot;
import ru.yandex.qatools.ashot.Screenshot;
import ru.yandex.qatools.ashot.screentaker.ViewportPastingStrategy;
public class Question1 {

    static WebDriver d;
    @BeforeMethod
    public void setUp()
    {
        System.setProperty("webdriver.chrome.driver", "D:\\selenium_NEW_PRACTICE\\jars\\chromedriver_win32\\chromedriver.exe");
        d=new ChromeDriver();
        d.manage().window().maximize();
    }
    @Test
    public void verifyLinkedInExam() throws InterruptedException, IOException
    {       
        d.get("http://www.ia.ca");
        getScreenshot();
        //take the screenshot of the entire home page and save it to a png file
        //Screenshot screenshot = new AShot().shootingStrategy(new ViewportPastingStrategy(1000)).takeScreenshot(d);
        //ImageIO.write(screenshot.getImage(), "PNG", new File("D:\\selenium_NEW_PRACTICE\\screenshots\\home"+System.currentTimeMillis()+".png"));
        d.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
        d.findElement(By.xpath("//span[contains(text(),'Loans')]")).click();
        d.findElement(By.xpath("//a[contains(text(),'Mortgages')]")).click();
        String mortgateTtl=d.getTitle();
        Assert.assertEquals(mortgateTtl, "Mortgage - Mortage rates | iA Financial Group");
        System.out.println("Verify title is pass : ");
        JavascriptExecutor js=(JavascriptExecutor)d;
        js.executeScript("window.scrollBy(0,700)", "");
        System.out.println("page is scrolling to down : " );       
        d.findElement(By.xpath("//a[contains(text(),'Calculate your payments')]")).click();
        JavascriptExecutor js1=(JavascriptExecutor)d;
        js1.executeScript("window.scrollBy(0,700)", "");
        System.out.println("page is scrolling to down : " );
        WebElement slider = d.findElement(By.xpath("//div[contains(@class,'slider slider-horizontal')]"));
        int width=slider.getSize().getWidth();
        System.out.println("printing size width of slider : " + width);
       
        Actions act=new Actions(d);
        act.click(slider).build().perform();
        Thread.sleep(1000);
        for(int i=0;i<2;i++)
        {
            act.sendKeys(Keys.ARROW_RIGHT).build().perform();           
        }
        for(int i=0;i<1;i++)
        {
        d.findElement(By.xpath("//*[@id='MiseDeFondPlus']")).click();
        }
        Select years=new Select(d.findElement(By.xpath("//*[@id='Amortissement']")));
        years.selectByVisibleText("15 years");       
        Select timeFrequency=new Select(d.findElement(By.xpath("//*[@id='FrequenceVersement']")));
        timeFrequency.selectByVisibleText("weekly");
        d.findElement(By.xpath("//*[@id='TauxInteret']")).clear();
        WebElement interestRate=d.findElement(By.xpath("//*[@id='TauxInteret']"));
        interestRate.sendKeys("5");
        d.findElement(By.xpath("//*[@id='btn_calculer']")).click();
        Thread.sleep(1000);
        String weekPayment=d.findElement(By.xpath("//*[@id='paiement-resultats']")).getText();
        System.out.println("printin weekely payment info : " + weekPayment);
        Assert.assertEquals(weekPayment, "$ 836.75");
       
    }
    @Test
    public void getScreenshot()
    {
        //take the screenshot of the entire home page and save it to a png file
                Screenshot screenshot = new AShot().shootingStrategy(new ViewportPastingStrategy(1000)).takeScreenshot(d);
                try
                {
                    ImageIO.write(screenshot.getImage(), "PNG", new File("D:\\selenium_NEW_PRACTICE\\screenshots\\home"+System.currentTimeMillis()+".png"));
                }
                catch(IOException e)
                {
                    System.out.println(e.getMessage());
                   
                }
    }
   
    @AfterMethod
    public void tearDown()
    {
        d.close();
        System.out.println("closing bowser : ");
    }
    }