A good stock-based mutual fund should earn at least10% per year over a long period of time. Consider the case of Barney and Lynn, who were overheard gloating about how well they had done with their mutual fund investment. We turned a $10000 investment of money in 1985 into$ 100000in 2012. What return (interest rate) did they really earn on their investment? Should they have been bragging about how investment-savvy they were? Instead if $800 had been invested each year for27years to accumulate $100000what return did Barney and Lynn earn?