Please explain and elaborate on it briefly. Thank you!!

8.1 An economics school has just completed a new office building worth $500,000,000. A campaign has been set up to raise funds for future maintenance costs, which are estimated to be $2,000,000 per year. Assume that the school can create a trust fund that earns 8% interest annually. a) Determine how much needs to be put in the trust fund now to cover the infinite periods of $2,000,000 annual costs. b) Now suppose an extra renovation cost of $100,000,000 would be incurred every 15 years besides the maintenance costs. Determine the total amount that has to be put in the trust fund now