please help with question 29 and 31

29. If an investor owns an income producing real property that is appreciating in value over his holding period, according to current federal income tax law the amount of depreciation he will be allowed to take each period as a deduction from his income (compared to what it would be if it was depreciating in value) will be: a. decreased I b. increased c. unaffected d. zero 30. Operating expenses used to estimate net operating income generally should Include: a. depreciation b. income taxes c. local property taxes d. mortgage payments 31. The method of the income approach that potentially considers all cash flows is: a. direct capitalization method b. discounted cash flow method c. gross income multiplier method d. net income multiplier method