There are $7$ DMUs with a single input and single output case.

Assume this is an output$-$oriented VRS problem.

$\backslash$table$[[$DMU$,$A$,$B$,$C$,$D$,$E$,$F$,$G$],[$Input$,1,3,4,6,8,9,10],[$Output$,1,5,3,7,10,10,10]]$

$(1)$Plot the VRS DEA frontier in the figure.

narrus,

$(2)$ Point out the fully efficient DMUs.

$(3)$ Point out the inefficient DMU.

$(4)$ Point out the weakly efficient DMUs.