Mary invested $$40,000$ in a business project. This business pays her $$12,000$ at the end of

each year for the next $5$ years at which point she sells her business for $$20,000.$ Prevailing

interest rate are currently $5\%.$

Q$3\mathrm{.}1$ What is the net present value of the project

Q$3\mathrm{.}2$ Is it worth investing in$?$