What is the standard deviation of returns for TechFluentthis year period . ( Compute the standard deviation assuming this is a population a sample - that is , use the procedure described in the textbook for standard deviation of a series of stock returns

The historical stock returns for TechFluent, Inc. are shown below: What is the standard deviation of returns for TechFluent, Inc. stock over this 4-year period. (Compute the standard deviation assuming this is a population of retums noi a sample - that is, use the procedure described in the textbook for calculating the standard deviation of a series of stock returns)