Your school has been left $£ 1 \; 000 \; 000$ in the will of an ex-pupil ...
• The money should have a lifetime of $50$ years.
You are asked to produce models of investment and expenditure based on any balance being invested at a fixed interest rate (it is suggested that you could start with a rate of $4 \%$). Your model could also consider different inflation rates.
What model would you choose to ensure the best return for the school over a period of $50$ years?