Call option chg to volatility

Using the Black-Scholes model calculate the value of a call option with the following information:

Item	Values
Stock price	$53
Strike price - exercise price	$49.29
Stock's standard deviation	20.2%
risk free rate	2.3%
time	2.25

What is the call price?

What would be the call price if the stock's volatility was 25.2%?

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Call option chg to Time

Using the Black-Scholes model calculate the value of a call option with the following information:

Item	Values
Stock price	$73
Strike price - exercise price	$61.32
Stock's standard deviation	26.8%
risk free rate	2.5%
time	0.25

What is the call price?

What would be the call price if the time to expiration was 5.25?