Answer:
Using
standard discounted cash flow analysis where we try to equate the PV of annuity of additional income with the PV of the money that is to be spend on additional education. There are three scenarios, which are tabulated as follows. It appears that interest rate of 5% or 6% is the one which makes it a good decision to go for higher educaiton. Rates higher than this aren't helpful.
Step-by-step explanation: