Suppose the force acting on a column that helps to support a building is a normally distributed random variable X with mean value 15.0 kips and standard deviation 1.25 kips. Compute the following probabilities by standardizing and then using Table A.3.

a. P(X 15)

c. P(X 10)

e. P(X - 15 3)

b. P(X 17.5)

d. P(14 X 18)