Let f(x) = 5x¹ -/+8√√-3. (a) Find f'(x). (b) Find the equation for the tangent line to the graph of f(x) at x = 1. 12. Find the bounded area between the curve y = x² + 10x and the line y = 2x + 9. SKETCH and label all parts. (SETUP the integral but do not calculate) 13/14. Let f(x)= x³ + 6x² - 15x - 10. Explain the following briefly. (1) Find the intervals of increase/decrease of the function. (2) Find the local maximum and minimum points. (3) Find the interval on which the graph is concave up/down.