Exercise 3: (15pts) Find the indefinite integrals 1) [ 46x5 dx 2) [ 217# dx 3) S(12x3 +=+ 7)dx Exercise 4: (10pts) Consider the following function: f(x) =3 x3 -5x+2 Find the slope of the tangent line to the curve of f(x) at the x = 2, then determine the equation of this tangent line. Exercise 5: (20pts) Parts A and B are independent Part A: A firm's marginal cost function is MC = 20 a) Find an expression for the total cost function if the fixed costs are 400. b) Find the total cost of producing 20 goods. Part B: The marginal revenue function of a monopolistic producer is MR =40-60 a) Find the total revenue function (Hint, TR=0 when Q=0) b) Deduce the corresponding demand function