For questions 18-19: You are holding 750 shares of Infosys Ltd. (USticker INFY) and you would like to hedge it in a delta neutral way. The INFY call option you select has a delia of 0.60 18. What position in the INPY call option, and the underlying stock, un delta-beutral portfolio A) A long position in 1.500 call options B) A short position in 1,500 call options C) A short position in 1.250 call options D A long position in 450 call options E) A short position in 450 call options 19. Due to the INFY call option's gamma, an increase in the underlying stock's price has caused the option's delta to increase ta 075. How would you restore the portfolio della neutrality A) Sell to open an additional 250 INFY call options B) Buy to close 250 of your short INFY call options C) Buy an additional 200 INFY shares D) Sell 100 of your INFY shares None of the above 20. You write an at-the-money covered call option expiring in one year with the ef-10 Three months later, both the underlying lock's price and the option's implied volatility are the same. What is the percent change in the option's premium during the lapsed time? A) -50% B) 25 C) 0 D) +255 3) 50