Suppose that the observations on a security price (in dollars) at the end of each of 14 consecutive weeks are as follows: 30.25, 32, 31.125, 30.25, 30.375, 30.625, 33, 32.875, 33, 33.5, 33.5, 33.75, 33.5, 33.25. Estimate the security price volatility.

Please provide the answer in code format (R studio)