The price of the underlying asset is S $=50,$ the strike price is X $=52\mathrm{.}50,$ and the risk free rate is r $=2\mathrm{.}5\%$ per year. The $"$up$"$ parameter is u $=1\mathrm{.}25$ and the "down" parameter is d $=0\mathrm{.}8.$

How many shares, h$,$ are needed to form a riskless portfolio for a call option.

a$.$

$22\mathrm{.}22$

b$.$

$1\mathrm{.}05$

c$.$

$\mathrm{.}95$

d$.$

$22$

e$.$

$50$