1. determine if the given differential equation is separable, linear or exact it may hint: when checking for exact, you should parable, linear or exact (it may be all three). ot exact, you should re-write to the midr+ n a y form. a) 3x? y + + (x3 + zey - 2y) - 0 b) + (1+y)} = 0 c) a = 2xy + 3x? ex? d) e*(y-2) + (1+emale = 0 ) 2 - 43 + y sin z = (3xy2 + 2y cos oldy

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?