Figure shows elliptical path abcd of a planet around the sun $S$ such that the area of triangle csa is
$\large\frac{1}{4}$ the area of the ellipse. (See figure) With db as the semimajor axis, and
ca as the semiminor axis. If $t_1$ is the time taken for planet to go over path abc and $t_2$ for path taken over cda then :