Task $2[40$ marks, $10$ marks each$]$ Provide the implementation of the following stored procedures and function. For submission, please include both the PL$/$SQL code and an execute procedure$/$SQL statement to demonstrate the functionality. a$.$ Create a function to calculate the distance between $2$ points using Euclidean distance formula. $\backslash [\backslash$text $\{$ dist $\}=\backslash$sqrt$\{\backslash$left$(\backslash$text $\{$ Latitude $\}\_\{1\}-\backslash$text $\{$ Latitude $\}\_\{2\}\backslash$right$)^\{2\}+\backslash$left$(\backslash$text $\{$ Longitude $\}\_\{1\}-\backslash$text $\{$ Longitude $\}\_\{2\}\backslash$right$)^\{2\}\}*111\backslash$mathrm$\{$Km$\}\backslash ]$ b$.$ A user is located at coordinate