just need reagents no need for structures, you can fill in answers like below;

a) 1.
2.
3.
b) 1.
2.
3. 
c) 1.
2.

part 2
Given the alkene product of a Wittig reaction below, draw the structures for 2 different phosphonium salts and 2 different carbonyl compounds that can be used as starting materials for the synthesis of this product.