please solve this Question ASAP

Read the following paragraph and answer the question#11 & 12. Flamming Inc., @ is the provider of buses for tour throughout Pakistan. The corporation is considering the replacement of 10 of its older buses. The existing buses were purchased six years ago at the total cost of Rs. 27, 00,000 and are being depreciated using MACRS and a five years recovery period. The new buses would have larger passenger capacity and the better fuel efficiency as well as lower maintenance cost. The total cost of 10 new buses is Rs. 30,00,000. Like the older buses the new one would also be depreciated using MACRS and a five years recovery period. Flamming Inc., @ subject to a tax rate of 40%. The following table presents revenue and cash expenses for the proposed purchase as well as the present fleet. MACRS rate of depreciation for 5 year is 20%, 32%, 19%, 12%, 12% and 5% respectively. Years With the proposed new buses revenue 1 6 (Excl. Depr. & Int.) Revenues 1,850,000 1,850,000 1,830,000 1,825,000 1,815,000 1,800,000 Expenses 460,000 460,000 468,000 472,000 485,000 500,000 With present Buses Revenue 1,800,000 1,800,000 1,790,000 1,785,000 1,775,000 1,750,000 Expenses 500,000 510,000 520,000 520,000 530,000 535,000 Question No. 11: Calculate operating cash inflows for the proposed buses. Question No. 12: Calculate operating cash inflows for the present buses