please solve this qustions in clearhand quicly i have 40 min

petroleum engineering economics

Q1) The project produces a number of units needed for a power plant project for purposing of routine maintenance as shown in the following table: # # Sales Quantity 710 Thousands units 1 2 Price for Sales Quantity Cost for Quantity Project life span (virtual) investment costs 11$ 9.5$ 7 years 1330 Thousands $ 3 4 Note that (i=9%) for whole project life. Adopting of sensitive analysis to answer the following: 1) The test of the project net present value under the following situations:- A) current situation, B) under the economic changes: Reduced selling price per unit (10%). & (15%)increase in sales & 5% decrease in the cost of the unit produced. C) Draw a graphically for illustrating the two cases and explaining it from an economic point of view. Q2) A machine was purchased for a sum of 290,000$ having useful life of 9 years. How to account the level of depreciation under Sum of years Digits Method? Note: Salvage Value =35,000$. Brief of the required results in a table? Q3) Answer any two of the following: "Due to the Corona pandemic, the energy industry has been affected at varying levels, and petroleum-producing countries have incurred losses for more than a year". Use this text to clarify the following economic concepts: A) Revenues B) Marginal costs C) Average Costs