Using Johneris nile for 2 machine wheoding the sequense is: Sx jobs are lo be processed stroygh a fwo-step operaton. The fint operabon molest aanding and the second invelves painting. Processing firmes are as folowe: \begin{tabular}{ccc} \hline Sob & \begin{tabular}{c} Operatioe \\ 1 (hours) \end{tabular} & \begin{tabular}{c} Opsration \\ 2 (Dours) \end{tabular} \\ \hline A & 12 & 4 \\ B & 8 & 11 \\ C & 5 & 14 \\ D & 5 & 2 \\ E & 9 & 10 \\ F & 2 & 1 \\ \hline \end{tabular}