$q-2$ Fruit farmer needs to earn $$8,000$ today and $$1,800$ three years from now in order to pay $$5,000$ maintenance costs each year in the next two years. Assume that the farmer's MARR is $5\%$ and compute the external effective rate $($ERR$)$ for the farmer.

Q$-3$ Ali invested in savings in two accounts as follows: $\frac{2}{3}$ of his savings are in a compounded interest account that pays an annual interest rate of $2\%$ and the rest on a simple interest account. If after $5$ years, he earns the same returns in both accounts, what is the annual interest rate of the simple interest account?