$[4$ marks$]$ Air is flowing through a venturi meter whose diameter is $6\mathrm{.}6$ cm at the entrance part $($location $1)$ and $4\mathrm{.}6$ cm at the throat $($location $2).$ The gage pressure is measured to be $84$ kPa at the entrance and $81$ kPa at the throat.

a$)3\mathrm{.}25$marks Neglecting frictional effects, determine the flow rate of air in $\frac{m^3}{s}.$ Take the density of air to be $1\mathrm{.}2k\frac{g}{m^3}.$

Flow rate of air $=$

$\frac{m^3}{s}$

b$)10\mathrm{.}75$ mark$]$ What is the average temperature of the air in $C.$