both questions needs help

Topic 9.7 - Defining Polar Coordinates and Differentiating in Polar Coordinates Circle the best answer for each problem. You may NOT use a calculator. 4. Consider the polar equation =22cos . a. Calculate the derivative, Zy, for the given polar equation. You do not have to simplify. x b. Find all values of 8 for which the polar graph has only a vertical tangent line. I g WA 3 (I 0 NS Topic 9.8 - Area of a Polar Region Bounded by a Single Polar Equation Topic 9.9 - Area of a Polar Region Bounded by Two Polar Curves You may NOT use a calculator. 4. The figure to the right shows the graphs of the polar curves r =2 and 7 =2+cos(26). Let R be the shaded region in the first quadrant bounded by the two curves and the horizontal axis, and R, be the shaded region in the first quadrant bounded by the two curves and the vertical axis. a. Setup, but do not evaluate, an integral expression that represent the area of region R, . b. Set up, but do not evaluate, an integral expression that represents the area of region R