please answer in excel with formulas

2. Suppose that in addition to the above rents and expenses, the building owner provides six months of free rent as a concession. Again using the 10% discount rate, what is the effective net rent over the three years? 1. A building owner charges rent of $20 psf in year 1,$21 psf in year 2 and $22 psf in year 3 . Expenses in the building are $8 psf. Using a 10% discount rate, what is the effective net rent over the three years? 2. Suppose that in addition to the above rents and expenses, the building owner provides six months orree rent as a concession. Again using the 10% discount rate, what is the effective net rent over the three years