Use the Black-Scholes formula for the following stock:

Time to expiration	= 6 months
Standard deviation	= 50 % per year
Exercise price	= 50
Stock price	= 50
Interest rate	= 3 %

Recalculate the value of the call option if:

a. Time to expiration	= 3 months
b. Standard deviation	= 25 % per year
c. Exercise price	= 55
d. Stock price	= 55
e. Interest rate	= 5 %

Select each scenario independently. (Round your answers to 2 decimal places.)

Time to expiration:
Standard deviation:
Exercise price:
Stock price:
Interest rate: