it should be a matrix but i dont know how to form it

An investor has $100,000 to invest. A real estate venture offers an average annual return of 10%, stocks average 6%, and municipal bonds average 2%. Because of the risk factors, the investor decided to invest twice as much money in stocks as in real estate. At the end of the year, the investor had made $6,800. How much did the investor invest in each of the three investments? on of il Jennon of sowens Woy g 10 3 SI suluinon A broad .boot ing to ebraid od wihr of elaw toboand A intros ferd darb e obivory of bealupon our aboard ow aid to giveme view woh