There are 2 investment -- a risk-free security that returns 2% and a risky asset that has expected return of 10% and standard deviation of 18%.

1). What are the weights of the complete portfolio that has an 8% expected return?

2). What is the standard deviation of that portfolio?

3). If the portfolio is valued at $100,000, how much do you invest in the risk-free security and how much do you invest in the risky asset?