Water flows through a piple AB $1\mathrm{.}2$ m diamter at $3$m$/$s and the passes through a pipe BC $1\mathrm{.}5$ m diameter. At C$,$ the pipe branches. Branch CD is $0\mathrm{.}8$ m in diamter and carriers one third of the flow in AB$.$ The flow velocity in branch CE is $2\mathrm{.}5$ m$/$s$.$ Find the volume rate of flow in AB$,$ the. velocity in BC$,$ the veloeity in CD and diameter of CE$.$