$2.$ a$.$ A chiller uses the refrigeration cycle based on heat transfer processes as shown in FIGURE Q$2.$

FIGURE Q$2$: Refrigeration cycle

i$.$ Explain the heat transfer processes $($if any$)$ that take place in the refrigeration cycle for each unit.

ii$.$ Saturared refrigerant$-134$a vapor at a pressure of $887\mathrm{.}5$ kPa is condensed on the outside of horizontal copper tube of $1\mathrm{.}2$ cm diameter and $2$ m long. The surface temperature of the tube is maintained at $\backslash (25^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ).$ Determine the average heat transfer coefficient over the entire tube, the rate of heat transfer from the refrigerant to the tube, and the rate of condensation of the refrigerant. State all your assumptions.