Use the Black-Scholes formula for the following stock:

Time to expiration	6 months
Standard deviation	47% per year
Exercise price	$59
Stock price	$59
Annual interest rate	4%
Dividend	0

Recalculate the value of the call with the following changes:

a.	Time to expiration	3 months
b.	Standard deviation	20% per year
c.	Exercise price	$67
d.	Stock price	$67
e.	Interest rate	6%

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