Assume completion time of service orders follows a normal distribution with a mean = 12 min and standard deviation 2 min. Which of the following is FALSE?

a) P(x<=10) + P(x>=10) = 1

b) P(x<=12) = P(x<=6) + P(x<=6)

c) P(x<=10) = P(x>=14)

d) P(x>=8) = 1 - P(x<=8)