Question 4 (7 marks) Sam Will is from New Zealand and now he is interested in investing in the Australian equity market. He needs your investment advises since his major is in engineering. (a). What does a put/call ratio imply? time [2 marks] b). What is the difference between a momentum and a contrarian investor? [2 marks] c). After your explanation in [2], Sam prefers a contrarian trading strategy. Given there is currently a high put/call ratio in the market, will Sam treat it as a bearish or a bullish signal? Why? [3 marks]