An investor has accumulated $$4,650$ and is looking for the best rate of return that can be earned over the next year. A bank savings account will pay $4\%.$ A one$-$year bank certificate of deposit will pay $6\%,$ but the minimum investment is $$7,650.$

Required:

a$.$ Calculate the amount of return the investor would earn if the $$4,650$ were invested for one year at $4\%.$

b$.$ Calculate the net amount of return the investor would earn if $$3,000$ were borrowed at a cost of $14\%,$ and then $$7,650$ were invested for one year at $6\%.$

c$.$ Calculate the net rate of return on the investment of $$4,650$ if the investor accepts the strategy of part $b.$ Note: Round your answer to $2$ decimal places.