Three fire hoses are connected to a fire hydrant. Each hose has a radius of $0\mathrm{.}026$ m$.$ Water enters the hydrant through an underground pipe of radius $0\mathrm{.}089$ m$.$ In this pipe the water has a speed of $2\mathrm{.}5$ m$/$s$.($a$)$ How many kilograms of water are poured onto a fire in one hour by all three hoses? $($b$)$ Find the water speed in each hose.