Consider the multifactor APT. There are two independent economic factors, F1 and F2. The following information is available about two well-diversified portfolios with risk free rate of 5%.

Portfolio	on F1	on F2	Expected Return
A	2.0	1.5	13%
B	1.0	1.0	10%

What's the risk premium of factor portfolio 1?

Group of answer choices

2%

6%

1%

4%