I. Find the following indefinite integrals. (a) (1 + 3t) +2 at 2r + 1 (b) 2VI (c) (2et -3cosI) di HIP + sec r tanr ) dx 2. Evaluate the following sum. 40 50 (a) [i(i -1) (b) _ k3 i=1 k-20 3. Use In and Rn to estimate the area bounded by y = v4-12, I = 0, r = 2, and the r-axis. Use n = 5 subintervals and calculate by hand. 4. Graph a plane region whose area is represented by the following and evaluate (9 - 3r) dr. 5. Find the average value of f(I) = V9 -12 on [-3, 3]