1 List at least three ways you can create a layer in a document?
   One way is to choose File > New and it will appear on the layers panel.  
   Another way is to hold down the Alt or Options key and press the Create a New Layer button at the bottom of the layers.
   The last way is to click and hold on the Layers panel menu and choose New > Layer.
2 Why should you be concerned about the resolution when composing several images?
   You should be concerned about the resolution when composing several images because you can change their effects, and                 change their order in which they are stacked.
3 What is the difference between the background layer and the regular layer?
   The back ground layer appears first and you can add more layers to it, its basically your background (a picture)and a regular layer is blank.
 
1 If you have an image in the grayscale mode and you want to colorize it, what must you do first?
 You use the brush tool and then you ca paint with any color.
2 What blending mode preserves the underlying grayscale of an image and applies a hue of the selected color? 
 the blending mode is the eye dropper.
3 What is the main difference between the way the Clone stamp and healing brush replace information in an image?
 the clone stamp is to copy the same thing, and the healing brush just corrects the color.
4 How many clone sources can be set in the clone source panel?
 There can be 5