I need step by step explanation on how the answer in bold were gotten.* The following prices are available for call and put options on a stock priced at $50. The risk-free raw is 6 percent and the volatility is 0.35. The March options have 90 days remaining and the June options have 180 days remaining. The Black-Scholes model was used to obtain the prices.Use this information to answer questions 1 through 20. Assume that each transaction consists of one contract (for 100 shares ) unless otherwise indicated. Answer questions 10 and 11 about a calendar spread based on the assumption that stock prices are expected to remain fairly constant Use the June/March 50 call spread. Assume one contract of each. 10. What will the spread cost? a. -$176 b. $ l76 c. $558 d. $105 e. none of the above 11. What will be the profit if the spread is held 90 days and the stock price is 545? a. $36 b. $20 e. $558 d -$20 e. none of the above