show the functions on excel please

\begin{tabular}{|l|l|} \hline 1 & \multicolumn{1}{c}{ A } \\ \hline 2 & Employee Name \\ \hline 3 & Vaddiyyah Kennedy Mejia \\ \hline 4 & Zakee Bryan \\ 5 & Arol Mccall \\ 6 & Debra Torres \\ 7 & Yvonne Acevedo \\ 8 & Han Tran \\ 9 & Simba Haley \\ 10 & Derek Kelley \\ 11 & Billy Johnston \\ 12 & Jernings French \\ 13 & Jerrilyn Banks \\ 14 & Jonas Flynn \\ 15 & \\ 16 & \\ 17 & \\ 18 & \\ \hline 19 & 20 \\ \hline 21 \end{tabular} a. You were asked to write ONE Excel function to convert each name into the following format: last name followed by a comma and a space and then followed by the first name. b. Next, write ONE Excel function to create an email address for each employee. The format of the email address is the last name followed by the first initial and then followed by the Qroubesticom. See below illustrations