Is there any smart people here who actually answer questions? everytime i ask questions, people just ignore them, or troll me. its so annoying. im asking to find at leat one person that can do stuff.

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?

Ineed to find the answer to number 2

Find 63% of 77. a. 0.485 b. 48.5 c.0.818 d.81.8