Can someone please solve this question? Thank you!

Here you are asked to consider a steady state device that involves one inlet and two

outlet streams. The inlet gas enters at $300K$ and an unknown pressure. $60\%$ of the inlet gas

leaves in one exit stream and is at $400K$; the remaining $40\%$ leaves in the second exit at an

unknown temperature. The gas in both exit streams is at $1$ bar. There is no work involved

and the device is well insulated.

a$.$ What is the exit temperature of the third stream?

b$.$ What is the minimum pressure of the inlet stream?

Assume the gas is ideal gas with $C_p=\frac{5}{2}R.$