Sample Std Deviation and Sample Covariance using TI BAII Plus pro because, believe, standard, question, like

whew1110

Can someone please tell me how to calculate sample standard deviation and sample covariance using the TI BAII Plus Pro.

Also, when the question tells us to find the Covariance (like in the CFAI Mock) do we find sample covariance or normal covariance? I believe that I got incorrect answer because I did not use sample covariance.