Since you didn't include the picture i could be wrong but the most famous 'study of a woman's back' i know of is matisse. 
        
                    
             
        
        
        
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lol right that's why I came on this app and people just say random to as answering the question and not even helping you
 
        
                    
             
        
        
        
A-la-mode and rake's process
        
             
        
        
        
The letters of ternary for A.K.A musical form are A,B,A
        
             
        
        
        
Just left to my own devices, I would have picked Stretch and/or Squash. The next closest thing (out of those three) is exaggeration. When you read the description of exaggeration, you find that physical characteristics can be exaggerated, but they should resemble some form of reality.
The second one is really a very close call. You could make a case for either secondary action, or follow through. The only one you could eliminate is pose to pose. That is reserved for how the action goes from one pose to another. That is more of a problem in technique than overall plotting. I think I'd pick follow through, because the character has stopped bouncing the ball, but he likely hasn't stopped sweating nor looking at his watch. 
Pretty interesting question. You are not going to get asked that every day.