l 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 S50. The risk-free rate 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. Calls Puts Strike March June March June 45 6.84 8.41 1.18 2.09 50 3.82 5.58 3.08 4.13 55 1.89 3.54 6.08 6.93 Use this information to answer questions 20. Assume that each transaction consists of one contract (for 100 shares) unless otherwise indicated. 20. What is the net present value of the box spread? a. $9.84 b. $ 5.00 c. $16.00 d. $1.84 e. none of the above