Find the Discounted Payback Period (DPP) for Oman Banking if the initial investment is 20000 OMR and the cash inflows are as follows: Year 1 5000 OMR: Year 2 =6000 OMR: Year 37000 OMR and Year 4-8000 OMR. Use discount rate as 5% col Select one a None b.336 Years c.4.12 Years d: 357 Years 239 Years