Respuesta :

[tex]\bf \stackrel{\boxed{L}}{-1}\underset{4-5~\hspace{10em}}{\stackrel{\textit{5 units}}{\rule[0.35em]{15em}{0.25pt}}}\stackrel{\boxed{M}}{4}\stackrel{\textit{5 units}}{\rule[0.35em]{15em}{0.25pt}}\stackrel{\boxed{N}}{9}[/tex]