Given the following data: Stock price = $50; Exercise price = $45; Risk-free rate = 6%; variance = 0.2 ; Expiration = 3 months. Calculate value of a European call option: [Use Black-Scholes Formula]. Please show step by step so I can understand how to do the problem myself. Thanks!

A) $7.62

B)$7.90

C)$5.00

D) none of the above