Stock 1 has an annual return of 10%, and stock 2 has an annual return of 15%. You have $10,000 invested in these stocks with $2,500 of the money in stock 1 and $7,500 the money in stock 2, please calculate the portfolio return. (Hint: the weight given to stock 1 is 0.25 and the weight given to stock 2 is 0.75) 13.75% 15.25% O 17.50% 14.25%