The Average Tardiness for the Jobs Listed in the Following

Multiple Choice

The average tardiness for the jobs listed in the following table under the shortest processing time (SPT) rule is______. $$\begin{array} { | c | c | c | } \hline \text { Job } & \begin{array} { c } \text { Processing time } \\\text { (in days\} }\end{array} & \begin{array} { c } \text { Due date (in days from } \\\text { today's date\} }\end{array} \\\hline \text { A } & 4 & 9 \\\hline \text { B } & 10 & 18 \\\hline \text { C } & 6 & 6 \\\hline \text { D } & 12 & 19 \\\hline \text { E } & 7 & 17 \\\hline\end{array}$$

A) 5 days
B) 6.6 days
C) 6 days
D) 5.6 days