Assume you are a tax planner for a client with the following concerns: a.Suppose there exist three riskless assets. The first yields a fully taxable return of 7% before tax, the second yields a pretax return of 6%, only half of which is taxable, and the third yields a 5% fully tax-exempt return. over what range of tax rates does each asset yield the highest after-tax return? how does this relate to tax clientele? b. supposes the tax rate schedule is as follows: 20% on the first $5.,000 of investment income. 30% on the next $5,000 of investment income, and 40% on investment income exceeding $10,000. if you had $150,000 to invest and had to invest in only one of the three assets, which one would maximize after-tax income? c. can you beat the investment strategy by investing in a portfolio of assets? what is the optimal investment over the range of investment from $0 to $500,000?