Please writ clearly and do a step by step explination Thank you Problem $1$: About $3$ miles $(15840$ feet$)$ of seawall along the San Francisco waterfront provides

an engineered interface between the city and the bay. Assume a tidal range along the seawall of

approximately $4$ feet between low and high tide, and the average depth of the Bay along the

seawall is $10$ feet.

$($a$)$ Draw the pressure prism at the seawall for low and for high tide.

$($b$)$ Determine the magnitude $($in pounds$)$ of the total resultant force acting on the seawall at

low and at high tide, and the location $($height from the bottom of the bay$)$ at low tide, and

at high tide.