YZA Ltd. is evaluating a project with the following financials:

• Initial investment: Rs. 2,50,000
• Project life: 5 years
• Expected annual profits before tax and after depreciation: Rs. 80,000, Rs. 85,000, Rs. 75,000, Rs. 70,000, Rs. 65,000

The depreciation rate is 12% on the original cost. The tax rate is 30%, and the cost of capital is 11%.

Required:

• Calculate the PBP and ARR.
• Compute the NPV and IRR.
• Determine the profitability index.
• Evaluate the impact of a 10% increase in annual profits on the project's NPV.
• Conduct a sensitivity analysis with a change in the tax rate to 35%.