Problem $3$: Water flows through a horizontal cylindrical pipe from a smaller$-$diameter region to alarger$-$diameter region. At point A$,$ where the pipes diameter is $3\mathrm{.}5$ cm$,$ the waters speed at $25\mathrm{.}0$m$/$s$.$ At point B$,$ the pipes diameter is $7\mathrm{.}0$ cm$.($a$)$ What is the waters speed at point B$?($b$)$ What is the pressure difference between points A and B$?$ Which point has the greaterpressure?