$11$a$.$ Determine the amount by which a stock index future is mispriced if the stock index

is at $198,$ the future is at $202\mathrm{.}5,$ the risk$-$free rate is $7\mathrm{.}50\%,$ the continuous dividend yield is

$2\mathrm{.}75\%$ and the contract expires in seven months $(210$ days$).$ Use continuous compounding.

a$.$ underpriced by $1\mathrm{.}06$

b$.$ overpriced by $4\mathrm{.}5$

c$.$ underpriced by $9\mathrm{.}92$

d$.$ overpriced by $1\mathrm{.}06$

e$.$ underpriced by $4\mathrm{.}5$