The following information is given about options on the stock of a certain company:

S$0=50$ K $=50$ r $=10\%$ per annum T $=0\mathrm{.}25\backslash$sigma $=30\%$ per annum

Dividend $=$ $$1\mathrm{.}50$ expected in two months

N$(0\mathrm{.}0420)=0\mathrm{.}5168$; N$(0\mathrm{.}1080)=0\mathrm{.}5430$; N$(-0\mathrm{.}0420)=0\mathrm{.}4832$; N$(-0\mathrm{.}1080)=0\mathrm{.}4570$ where d$1$ or d$2$ are not specified, you need to identify.

What is the price of a European put?

The volatility of the returns of a stock is estimated to be $36\%$ per year. What is an estimate of the standard deviation of the change in the stock price in one month in percentage?