Vivienne has $10,000 cash she can use for investments. Company A's share has an expected return of 10% p.a. Company B's bond has an expected return of 5% p.a. Vivienne wants to set up a portfolio including the two assets. If Vivienne wans a return of 8% p.a. from her portfolio. How much should she invest in Company A's share and how much should she invest in Company B's bond?