The expected returns on stocks of Firms A, B, and C are 7%, 12%, and 16%, respectively. You decided to buy all three of these companies' stocks. You invested 13% of your money into Firm A's stock shares, 66% of your money into Firm B's stock shares, and 21% of your money into Firm C's stock shares.

(a) The expected return on this portfolio equals ___ percent.

(b) True or false? In general, portfolio expected return can be negative. This statement is ___.