Solve using MATLAB please

Turbulent flow occurs within the $r=25mm$ radius smooth$-$wall pipe as shown below. If pressure at A and $B$ are $P_A=10,000Pa$ and $P_B=8,500Pa$ respectively, $L=8m.$ Calculate the shear stre $S$ acting long the wall of the pipe using following formula:

$S=\frac{r(P_B-P_A)}{2L}$

where $r$ is the radius of pipe in meter, $L$ is the distance of point $A$ to $B$ in meter, and $P_A,P_B$ and S in Pa $.$

$S=$

$$

A $,Pa$