question $1$ A solid cylindrical needle of diameter d$,$ length L $,$ and density ${}_n$ may float in liquid of surface tension T$.$ Neglect buoyancy and assume a contact angle of $0.$ Derive a formula for the maximum at $200($ii$)$ Repeat the problem if the contact angle is $,$ not $0.($iii$)$ Also comment on the value of maximum diameter if the buoyancy force is not neglected.

question $2$ The velocity field is $u=k_{1}x,v=k_{2}y,w=0.$ Derive the streamline formula and draw the streamline if $k_1=k_2=1.$

I need help with these two question