The Current Spot Rate of the Hong Kong Dollar Against

The current spot rate of the Hong Kong dollar against the pound is S₀^£/HK$ = £0.10/HK$. The standard deviation of continuously compounded annual changes is estimated to be 10%. What price is two standard deviations below the current exchange rate?

A) £0.0778/HK$
B) £0.0800/HK$
C) £0.0819/HK$
D) £0.0900/HK$
E) Cannot be determined from the information given