3. Write out syntheses for the following compounds. Show all reagents and the products of each step. Realize that there is typically more than one way to accomplish a synthesis, but shorter, simpler syntheses are preferred. (a) CH2 from CH3 H2C H2C. Br from Br as only source of C atoms CH3 (C) HO from as only source of C atoms (d) CH3 from CH3 H3C H3C CN OH