Hello Tutor, Please solve the problems that are in yellow highlighted. This problem have four parts to it (a, b, c, and d). Thank you and I would leave a thumbs up.

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. 231. [T] f(x) = sin(xx) - cos(xx) over x = [-1, 1] 232. [T] f(x) = x + sin(2x) over x = [-5. =] 233. [T] f(x) = sinx + tanx over 234. [T] f(x) = (x -2)2(x- 4)2