Jeremiah invested $1,200 in a Certificate of Deposit, $3,500 in a corporate bond, $900 in a common stock, and $2,475 in a preferred stock, The COD has a rate of return of 2.1%; the corporate bond is -1.3%; the common stock's rate of return is 4.1%; and the preferred stock has a rate of return of 5.5%. What is the weighted mean, mean and median overall rate of return on Jeremiah's investment portfolio?