The following table shows a data of a project. Find the values of ES, EF, LS, LF and float (slack) for the task D. \begin{tabular}{|l|l|l|} \hline Activity & Duration (weeks) & Predecessors \\ \hline A & 7 & - \\ \hline B & 3 & - \\ \hline C & 2 & A \\ \hline D & 3 & B \\ \hline E & 6 & C, D \\ \hline F & 8 & E \\ \hline \end{tabular}