Country A levies an individual income tax with the following rate structure: Ms. SP's annual taxable income for years 1 through 5 is $127, 000. Ms. OC's taxable income for years1 through 4 is $15, 000. In year 5, Ms. OC wins a lottery, and her taxable income for this one year jumps to $575, 000. Assume the tax rate bracket has not changed. a. How much total income does each individual earn over the 5-year period? b. Compute each individual's average tax rate for the 5- year period