Problem 9-11 (Algorithmic) Building a backyard swimming pool consists of nine major activities. The activities and their immediate predecessors are shown. Choose the correct project network. Activity A B C D E F G H I Immediate Predecessor A A B, C B D D, E F, G, H A C -F A c F H H Star Finish Start I Finish B D G B D G E E (1) (ii) A C E A CF H H Start Finish Start I Finish B D B D -G F E (iii) (iv)