Estimate for the standard deviation of the population?give detail answers to each of the problem below 1. you deposit $ 10,000 in a savings account today.if the interest rate is 3 % what is the value in 20 years ? 2. if the interest rate is 7% and the tax rate is 15 % what is the after tax cost of capital for the firm ? 3. inc."s stock is currently $50. the last dividened that they paid was $1. if the dividends are expected to increse at a 10% annual rate , what is the firms's equity cost of capital?