What impact will each of the following events have on a firms weighted average cost of capital? a. The corp tax rate is lowered b. The firm increases its leverage c. The firm's stock price falls dramatically d. NY city imposes a stamp tax on share issues floated there. e. The government allows private investors to exclude up to $1,000 in dividends from taxable income. f.The firm sells a division and replaces it with a less risky project