When a man returns to his well$-$sealed house on a summer day, he finds that the house is at $35\backslash$deg C$.$ He turns on the air conditioner, which cools the entire house to $20\backslash$deg C in $30$ min. If the COP of the air$-$conditioning system is $2\mathrm{.}8,$ State assumptions, and $(2)$ Determine: $2\mathrm{.}1$ the power drawn by the air conditioner. Assume the entire mass within the house is equivalent to $800$ kg of air for which cv $=0\mathrm{.}72$ kJ$/$kg$\backslash$deg C and cp $=1\mathrm{.}0$ kJ$/$kg$\backslash$deg C$.$