To calculate the expected return of the portfolio, we need to multiply the percentage allocation of each asset class by its respective expected return and sum them up.
The expected return of the T-Bills is 45% * 2% = 0.9%
The expected return of the large-company stocks is 40% * 10% = 4%
The expected return of the small-company stocks is 15% * 15% = 2.25%
Now we add up these expected returns:
0.9% + 4% + 2.25% = 7.15%
Therefore, the expected return of the portfolio is 7.15%.