please show all steps and equation used to solve this problem.$(30$ points$)$ A$)$ The submersible that is missing near the wreck of the Titanic has one viewing port

$($window$)$ that is circular with a diameter of $21$ inches. Determine the force on this window at the

depth of the Titanic wreck which is at $12,500$ feet. B$)$ Determine the force on the window shown

in the following illustration:

Where I $($the chord length$)$ is given by $2(R^2-d^2{)}^{\frac{1}{2}}$