(4 pts) 3) The integral 12 In ada must be done by parts. Explain why letting u = 12 is not a good need to integrate). idea. List the choices you would make for u and du as well as the corresponding du and v (you do NOT (2 pts each) 4) Briefly explain what method you would use to evaluate the following integrals (you do NOT have to integrate them, just explain the method you would use) a) In ( 2x ) dx To integrate the log functions , I would use integral by parts. b) [ ( 2 + 1) dx To integrate osin c c) -dx sec T