$(2)$ A rectangular channel has a bottom width of $6\mathrm{.}3$ ft $.$ A hydraulic jump forms in the channel with sequent depths of $0\mathrm{.}45$ ft and $4\mathrm{.}25$ ft $.$ What is the unit discharge in the channel? Find the energy loss per unit fluid weight and the minimum specific energy for this condition. Estimate the length of the jump.