QUESTION 1. Develop a network diagram for MHC and determine the probability that the contractors can complete a house in 42 days or less. DO NOT round up/down the calculated expected time. Keep it at two decimal points. Table 1 Activity a b e f Description Excavation, pour footers Lay foundation Frame and roof Sewer (floor) drains Install insulation Pour basement floor Install windows Rough electrical wiring Install furnace Exterior brickwork Install plasterboard Roof shingles Attach gutter Grading Lay subflooring Lay driveway Kitchen, sink, appliances Painting Finish wood floor g i J k 1 m Time (Days) Predecessor a none 3 a 2 b 2 b 1 2 e 2 f 1 f 1 c,g 3 i 5 jik 6 2 n 1 2 m 3 4 2 t 4 2 m 4 3 4 2 4 3 3 2 5 6 8 3 2 3 4 6 4 b 6 5 5 3 5 5 4 4 8 10 12 n o uno WNW 000 q r -COEO > 5 7 6 10 8 10 t v w QUESTION 2. Use the Normal time given in the table below to reduce the project by 6 days. What is the added cost? Show the activity/activities that need to crash for each day. What activity to crash for the 1st day, what activity to crash for the 2nd day, and so forth. Predecessor Normal none 6 Time (days) Crash 4 Activity cost (5) Normal $10 Crash 20 28 22 a 5 3 $22 b 5 4 b 25 3 5 2 4 30 5 18 e f 3 3 4 22 20 f 3 2 8 5 Activity Description a Excavation, pour footers b Lay foundation Frame and roof e Sewer (floor) drains f Install insulation g Pour basement floor i Install windows J Rough electrical wiring k Install furnace I Exterior brickwork m Install plasterboard Roof shingles o Attach gutter Grading q Lay subflooring r Lay driveway t Kitchen, sink, appliances Painting w Finish wood floor c,g i jik 23 28 8 6 10 8 $15 $21 $25 $12 $20 $20 $11 $16 $18 $23 $25 $12 $17 $20 $18 $15 $25 26 n 4 3 29 5 2 o 7 3 31 16 22 5 4 1 LIG. 3-4-5-H.H.NO PH 1 TICA ... RS ... WI w 448 Bam