[15] For the curve defined by the following pair of parametric equations. x(t)= cos( t), y(t)=sin(2x 1), 0sts 2 a. Identify the point on the graph for which the y-value is a maximum. What is the associated t- value? b. Set up the integral you would need to evaluate in order to find the length of this curve. c. Evaluate the integral using 4 midpoint rectangles. Show the TI command(s) you use. Give your answer rounded to the thousandths place (more decimal are okay).