A pension fund is invested in three index funds. 40% in an S&P 500 index fund with an expected return of 6% and an expected standard deviation of 16%, 10% in a rest of the world index fund with an expected return of 6% and an expected standard deviation of 17%, and 50% in a US Bond index fund with an expected return of 4% and an expected standard deviation of 8%.

What is the total fund's expected return?

		5.5%
		Not enough information to calculate
		4.5%
		5%