$(30\%)-$ In a $4$ in ID cast iron pipe water flows at a flow rate of $0\mathrm{.}3$ cu ft per minute. $($a$)$ Calculate the pressure drop $($psi$)$ for $10,000ft$ of the pipe under this flow rate. $($b$)$ Calculate the pressure drop $($psi$)$ for the same pipeline when flow rate is increased $10$ fold.