12. Compute the following definite integrals. Give al answers as exact values, not decimal ap the FTC part I to arrive at your answers proximat tions. Also, make clear how you are using (bos(2r) dr 10 (c) f(x) dx, where f(x) is the piecewise defined function r3orr 80,4-2x for x > 2. f(x) =