$[2$pt$]$ Two planets orbit a much more massive star, as shown in the figure. One of the planets has a mass $m_1=6\mathrm{.}29{10}^{24}$ kg and it moves in a circular orbit of radius $r_1=5\mathrm{.}9850{10}^{10}m$ with a period $T_1=1\mathrm{.}7yr.$ The other planet has a mass $m_2=7\mathrm{.}59{10}^{26}kg$ and it moves in an elliptical orbit, with its closest distance $r_1=5\mathrm{.}9850{10}^{10}m$ and its farthest distance $r_2=1\mathrm{.}07{10}^{11}m.$ Find the period $T_2$ of planet $m_2\text{'}$s orbit.

$[2$pt$]$ What is the mass of the star?

$[2$pt$]$ What is the speed of planet $m_1?$