[5 points] Do the following: (a) Find a function f that has y = 4 - 3x as a tangent line and whose derivative is equal to f' (x) = x2 + 4x + 1. (b) Find the area under the curve for f(x) = x3 on [-1, 1]. e21 - 2 (c) Determine where the function is f(x) = So di increasing. cos(12 - 1) + 3 (d) Express ( sin(x2)dx as limits of Riemann sums, using the right-hand rule. Do not evaluate the limit