question $1$ A velocity field is given by $u=$Vsin$,v=$Vcos$,$ and $w=0,$ where $V$ and $$ are constants. Derive

a formula for the streamlines of this flow.

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 $k_1=k_2=1.$

can you help me solve question $1$ and $2$ pls