Question

Let be the radial force field . Find the work done by this force along the following two curves, both which go from (0, 0) to (5, 25).
A. If C1 is the parabola: x=t, y=t^2, 0<=t<=5, then Integral of Fdr = ?
B. If C2 is the straight line segment: x=5t^2, y=25t^2, 0<=t<=1, then Integral of Fdr =?