Two rigid tanks are connected by a valve. The left tank is filled with $6\mathrm{.}4$ ft$3$

of air initially at $31\mathrm{.}3$ psia and $87\mathrm{.}7$

F$.$ The right tank is filled with $14\mathrm{.}3$ ft$3$

of air initially at $17$ psia and $108\mathrm{.}6$

F$.$ The valve is opened and the system reaches equilibrium without gaining or losing any energy overall $($meaning that the total energy of the air does not change$).$ Assume that the specific heat is constant and can be taken at a temperature of $80$

F$.$

a$)$ What is the final temperature of the system after the valve is opened?

$$

F

b$)$ What is the final pressure of the air after the valve is opened?

psia