(This is in the Java language. I just need help with these methods the constructor code is already written) (Need method to increase red, grayscale, and the last method) Thank you!

Question 1.

Write a method named makeSunset3() to make a sunset. Don not decrease blue and green, but increase red. You can use beach.jpg to test this method.

Question 2. Write a method blackWhite() that create a black and white picture from a color picture. The idea is as follows: For each pixel, let avg = (r+g+b)/3. If avg < 64, set the color black. If avg >= 64, set the color white.

Question 3. Write a method changeBlue(weight). Do not change any color of the pixels in the first half of a picture. For the second half, change blue value of each pixel by new blue=original blue * weight. For example, if a pixel has values (200,100,100) and weight is 0.5, then the new values will be (200,100,50). If the weight is 1.5, then the new values will be (200,100,150).