1. Find all possible f(x) such that f"(x) = 3x7 - 2x5 +x2+1. 2. Determine the value of En- cos( Jn). 3. If [ f()de = 25 and [ ( )de = 9, find 4. If f (2) = 15, f' is continuous, and [f'(z)de = 11, what is the value of f(6)? 5. (a) Evaluate the Riemann sum for f(x) = 6x3 -3x, taking the sample points to be right endpoints and a = 0, b = 4 and n = 2 (b) Evaluate - 6x3 - 3rdr