Using Fig. $9\mathrm{.}32,$ determine the required parachute diameter $($in m$)$ to ensure that a $86\mathrm{.}1-$kg parachutist will fall to the ground at rate of $15\mathrm{.}5$ mph $.$ Ignore the contribution of drag from the human.

$\backslash$table$[[$Shape$,$Reference area,$\backslash$table$[[$Drag coefficient$],[C_D$