Given that S= X = $30, r_f = 2% per year, and time to expiration is 3 months, find the value of the unknowns if S_{up, 3} = $36, and S_down,3 = $28. Use the table below for help. Transact the lowest integer number of shares or options.

Initial transactions	CF0	CF3, mths
		Sup,3mths = $36	Sdown,3mths = $28
A		w
B
S =		z

What is the value of "w" in the above payoff table? A is option transaction, B is stock transaction.

Group of answer choices

A. 12

B. 24

C. -24

D. -12