Hydropower Engineering past question

The mean monthly flows of a river in a typical dry year are as follows [table]. Other data: prevailing interest rate=12%, Energy selling price=Rs 5000/Mwh and 3000/Mwh for primary and secondary energy, installation (Electro-mech) cost = Rs 80000/kW, project life time = 40 yrs, overall efficiency of the plant = 87%, Effective head = 100m, O&M cost = 2% of electro mechanical cost, fixed cost = Rs 30×10⁹. a) Determine the installed capacity of such plant. b) Calculate the firm power of the plant, considering 95% probability of exceedance of flow. c) If the deficit in the firm power in the power system is 200 MW what is the storage capacity of reservoir to satisfy the demand. [5+2+2]