For the following exercises, determine a. intervals where f is increasing or decreasing, b. local minima and maxima of f, C. intervals where f is concave up and .concave down, and d. the inflection points of f. Sketch the curve, then use a calculator to compare your answer. If you cannot determine the exact answer analytically, use a calculator. 232. [T] f(xr) = x+ sin(2x) over x = 2.