Problem $05\mathrm{.}125-$ Discharging process

VA $4-$L pressure cooker has an operating pressure of $175$ kPa $.$ Initially, one$-$half of the volume is filled with liquid and the other half with vapor. If it is desired that the pressure cooker not run out of liquid water for $74\mathrm{.}0$ min $,$ determine the highest rate of heat transfer allowed. The properties of water are $v_f=0\mathrm{.}001057\frac{m^3}{k}g,vg=v_2=1\mathrm{.}0037\frac{m^3}{k}g,u_f=486\mathrm{.}82k\frac{J}{k}g,u_g=u_2=2524\mathrm{.}5($Round the final answer to three decimal places.$)$

The highest rate of heat transfer is $$ kW$.$