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Consider the following table of precedence relationships for a portion of a house building project: a-1. Calculate earliest start and finish for each task. (Leave no cells blank - be certain to enter "0" wherever required.) \begin{tabular}{|l|l|l|l|} \hline D & C & & \\ \hline E & None & & \\ \hline F & D, E & & \\ \hline G & F & & \\ \hline H & G & & \\ \hline I & G & & \\ \hline J & I & & \\ \hline K & H, J & & \\ \hline L & K & & \\ \hline M & L & & \\ \hline N & I & & \\ \hline O & D & & \\ \hline P & O & & \\ \hline \end{tabular} a-2. Calculate slack for every project activity. (Leave no cells blank - be certain to enter "o" wherever required.) Consider the following table of precedence relationships for a portion of a house building project: a-1. Calculate earliest start and finish for each task. (Leave no cells blank - be certain to enter "0" wherever required.) \begin{tabular}{|l|l|l|l|} \hline D & C & & \\ \hline E & None & & \\ \hline F & D, E & & \\ \hline G & F & & \\ \hline H & G & & \\ \hline I & G & & \\ \hline J & I & & \\ \hline K & H, J & & \\ \hline L & K & & \\ \hline M & L & & \\ \hline N & I & & \\ \hline O & D & & \\ \hline P & O & & \\ \hline \end{tabular} a-2. Calculate slack for every project activity. (Leave no cells blank - be certain to enter "o" wherever required.)