You have a project with the following activities. What the cumulative budget at the end of period 10? Activity Duration Predecessors Expected Cost 1 3 $ 5,250 2 3 1 $ 5,250 3 3 2 $ 5,250 4 4 2 $ 5 1 3,4 $ 1,750 9 4 4 $ 7,000 6 10 4,5 $ 17,500 7 2 6,9 $ 3,500 8 1 79 $ 1,750 7.000 lo con a) 22,750 Ob) 21,000 c) 23,750 d) 20,750