Mary buys a call option on the australian dollar (a$) with a strike price (k) of $0. 9100/a$ at a premium (p) of $0. 03/a$ and with an expiration date six months from now. The option is for a$100,000. Should mary exercise the option? according to her decision, what is mary’s net and gross profit or loss at maturity if the ending spot rates (st) are $0. 8800/a$, $0. 9100/a$, $0. 9200/a$, $0. 9400/a$, and $0. 9700/a$?.