$2\mathrm{.}11$ Use the CONCAT function to combine the text in cells $,$ B$12,$ C$7),$ J$12,$ and $($in that order$)$ to create the "Text Stamp" in cell

a$.$ The "Text Stamp" in cell K$12$ should read "Employee number $18$ entered the server room at $00$:$53$:$02$ today."

b$.$ Use absolute cell reference when necessary so that the function can be reused.