Ms Aisha Arnold buys a 182-day treasury bills at a price of GHS8,800 today. She expects to receive GHS10,000 at the end of the investment period. Inflation is expected to be 17% in the coming year.

Required:

1. Compute the holding period return on the investment.
2. Compute the annualized nominal rate of return on the investment.
3. Compute the real rate of return on the investment.
4. Suppose the returns from the investment is subject to 8% investment income tax, compute the after-tax nominal rate of return and real rate of return.