Estimate the average daily discharge-nbsp estimate pondage

Question

The weekly discharge of a typical hydroelectric plant is as under :

Day                        Sun   Mon   Tues   Wed   Thurs   Fri   Sat

Discharge(m³/sec)   500    520   850     800    875     900  546

The plant has an effective head of 15 m and an overall efficiency of 85%. If the plant operates on 40% load factor, estimate

(i) the average daily discharge

(ii) pondage required and

(iii) installed capacity of proposed plant.