### Taylor polynomial, Lower and Upper sums

2a. Find the second order Taylor polynomial for f(x) = x^(1/3) about x = x0, x0 > 0. 2b. Show that the function G(x) is differentiable at x0 and find G'(x0). 3a. Find an expression for the lower sum L(f,D) and upper sum U(f,D). 3b. Determine the lower integral and upper integral. Please refer to the attached images f