QUESTION $4(25$p$)$: A steel sphere having a specific gravity of $SG=7\mathrm{.}8$a and a diameter of $5bmm$

is released in a tank full of water at $+4C.$ The dynamic viscosity of water is ${1\mathrm{.}5}^{**}{10}^{-3}N\frac{s}{m^2}.$

Determine the terminal velocity $(W_S)$ of the steel in terms of drag coefficient $($CD$)$ and calculate the

drag coefficient $($CD$)$ via the graphic given below.