Three recent college graduates have formed a partnership and have opened an advertising firm.

Their first project consists of activities listed in the following table.

Activity Immediate Predecessor Time in days

A $-6$

B A $8$

C A $8$

D B $14$

E C$,$D $6$

F E $7$

G E $5$

H G$,$F $4$

I H $7$

What is the minimum time required to complete the project?