Activity Expected Time Standard Deviation of Time Estimate Immmediate Predecsssor Column$1$

A $72-4$

B $31$ A $1$

C $93$ A $9$

D $41$ B$,$ C $1$

E $51$ B$,$ C $1$

F $82$ E $4$

G $81$ D$,$F $1$

H $62$ G $4$

critical path $3$ pts

project completion time $3$ PTS

probability that the project will take more than $49$ time periods $3$ pts