If Transmisiity is $2\mathrm{.}5$ cm$^2/$sec how wouldn I do this problem

A well of $0\mathrm{.}1-$m radius is installed in the aquifer of the preceeding exercise and ispumped at a rate averaging $80$ liters$/$min$.$

$($a$)$ Estimate drawdown in this well if the radius of influence is $100$ ft$.$

$($b$)$ Estimate the hydraulic gradient in the aquifer at distances of $20$ and $75$ ft$,$ both directlyupstream and downstream of the well.