Please help with 1-3 please.

1. The area under a particular normal curve to the left 2. Two normally distributed curves have the of 105 is 0.4227. Show this on a diagram. the following parameters: Curve 1: u= - 4, 6=3 Curve 2: u = 6, 6 =1 Compare these curves using shape and position. a) What percentage of all possible observations of the variable lie to the left of 105? b) What percentage of all possible observations of the variable lie to the right of 105? 3. Given: P(A) = 1/3, P(B) = 1/4, and 4. The following table includes frequencies for families P(A&B) = 1/12 of varying sizes. Find: Given in thousands: Find: P(A or B) a) P(4) The prob that a randomly Size Frequency selected family has 4 members. 2 34,450