I am trying to solve the following questions. I used all the examples given for these units: I cannot seem to tackle them.Could you please explain these four problems in detail? I would greatly appreciate it.

1)

X 2 3 4 P(X) 5 .2 3 .2 .2 .1 independent, what's the probability that a is 4.5 or larger? 1. A population is described by the probability distribution shown. The random variable x is observed twice. Assuming these observations are1' nun pix} 1:3 1:3 . Consider the probability distribution shown. Find |.I for this distribution. Assume x is a normally distributed random variable with mean = 11 and variance = 2. Find P(10 s x s 12).Find the z-ecere that determines that the area to the right at z is 0.8264