fill the chart

C. How much slack is in each of the activities G,H, and 1 ? B. Ponsider the following data for a project to install a new server at the Northland Pines High School: \begin{tabular}{ccc} \hline Activity & Activity Time (days) & Immediate Predecessor(s) \\ \hline A & 3 & - \\ B & 5 & A \\ C & 6 & A \\ D & 3 & B \\ E & 1 & B \\ F & 7 & B, C \\ G & 3 & D,E \\ H & 3 & F \\ I & 5 & F \\ J & 8 & G. H, \end{tabular}