I need help with these questions. Could you please show full working out and explain why you do those steps. For Q1 I seem to get a different answer from the solutions, not sure if my substitution is right and for Q2 I need help with parts (b) and (c). I'm confused with how to find the integral of ln(x) in part (b).

. . . 71' 1. Calculate the exact area of the regron enclosed by the x-ax1s, y = cos(x) and the llnes x = - and x = 5%. (Use a sketch graph to assist your calculation.) 2. a. Differentiate xloge(x) for x > 0. b. Hence, determine an antiderivative of loge(x). c. Determine the area bounded by the graph of loge(x), the xaxis, x = l and x = 4, giving your answer in exact form