Assume all rates are per annum continuously compounded

Consider the following three European call options, all expiring in one year. Option A has strike $17.00 and premium $7.00; Option B has strike $22.00 and premium $4.00; Option C has strike $27.00 and premium $2.00. Suppose the price on the stock today is $22.00.

(a) Which call(s) is(are) in-the-money? A. Option A B. Option B C. Option C D. None of the above

(b) Which call(s) is(are) out-of-the-money? A. Option A B. Option B C. Option C D. None of the above

(c) Suppose the risk-free rate is 4.7%. What is the maximum possible profit of the butterfly?