Question $1(5$ points$)$

a$.(2$ points$)$ Proof that the Stokes$-$Oseen formula $F=3DV+0\mathrm{.}53(V^2{D}^2)$ for drag force $F$ on a

sphere of diameter $D$ in a fluid stream of low velocity $V,$ density $p,$ and viscosity $$ is dimensionally

homogeneous?