I need solve this questions

Work Problem 2 [15+15+15=45 points]: Show your Work. a) [15 points]: Find the volume of the solid obtained by rotating the region bounded by the lines y = 3x + 5, y = 5 and x = 2 about the x-axis. b) [15 points]: Determine whether the series 0O n2 en-3 n= is convergent or divergent. c) [15 points]: Consider the series: 5- 1+ UI| H + ... 25 i) Is the given series a geometric series? Explain. ii) Determine whether the series is convergent or divergent. If it is convergent, find the sum. If it is divergent, explain why