Add a cell to create a function and name it my$\_$function$\_$firstname, where firstname is your first name.

Let the function return an integer value stored in one byte i$.$e$.$int$8$ of $(4$x$)*(3$y$).$ Where x is the number of rows and y is the number of columns.

Use np$.$fromfunction$()$ to generate three elements each are two by six using the my$\_$fuction$\_$firstname.