10. Find the area A between the parametric curve f (t) = (cost, sin?t ) and the x-axis. 11. Find the area A enclosed by the curve C defined by the parametric equations x(t) = 2cos(2t) + cos(41) and y(t ) =2sin(2t ) + sin(4t ) . (Hint: Find a t -value such that (x(a), y(a))= (x(B),y(B)), that is the initial point is equal to the terminal point.)