Q$3.$ Water flows from left to right through the pipe as shown in the picture. At point $1,$ the pressure of water is $1020$ pascal and it travels with the velocity of $30\frac{m}{s}.$ The cross$-$section area at points $1$ and $2$ are $0\mathrm{.}92m^2$ and $0\mathrm{.}12m^2,$ respectively. $($Consider the density of water as $1000k\frac{g}{m^3})$

$($a$)(5$ points$)$ Find the speed of $n$

$($b$)(10$ points$)$ Calculate the pressure at point $2$ which is located $1\mathrm{.}20$ m above the ground $($see figure$).$