There are four cities A, B, C and D in Wonderland. You can get from city A to city B by 6 highways, and from city B to city C by 4 highways. There are two highways running from city A to city D. City D and city B have two highways connecting them as well. How many ways are there to get from city A to city C? PLEASE HELP ME I REALLY NEED THIS QUESTION ANSWERED

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?