$222g$ of an ideal gas composed of helium atoms undergoes the following cyclic process: A $($isovolumetric process$),$ B $($isobaric expansion$),$ C $($adiabatic compression$),$ as shown in the figure below. The molar mass of helium is $M_{He}=4\mathrm{.}00gmo{l}^{-1}.$

Using $P_1=3\mathrm{.}40$atm,$P_2=1\mathrm{.}09$atm, and $V_1=0\mathrm{.}610m^3,$ answer the following questions:

Part $1)$

What is temperature at point $1?$

$T_1=$

$C$

Part $2)$

What is the volume at point $3?$

$V_3=,m^3$

Part $3)$

What is the change in internal energy during process $C?$

$E_{\text{i}\text{n}\text{t}}=kJ$