You are an investment advisor for Alan and Jimmy. You've helped them optimally allocate their investment portfolios along the same capital allocation line (CAL). If Alan's portfolio has a higher weight on risk-free asset than Jimmy's portfolio, then which of the following statements MUST be true: a) Alans portfolio has lower expected returns than Jimmys b) Alan is less risk-averse than Jimmy c) Alan must hold a positive position in the risky asset