Problem #$1$: $(9)$

The following table gives data, in Btu, for a system undergoing a thermodynamic cycle consisting of four processes in series. Determine:

$($a$)$ the missing table entries, each in Btu. Give all calculations for only process #$4.$

$($b$)$ whether the cycle is a power cycle or a refrigeration cycle.

$\backslash$table$[[$Process$,U,KE,PE,E,Q,W$