Water enters an ice machine at 55o F and leaves as ice at 25o F. If the COP of the ice machine is 2. 4 during this operation, determine the required power input (in hp) for an ice production rate of 28 lbm/h. Note that 169 Btu of energy needs to be removed from each lbm of water at 55o F to turn it into ice at 25o F.