The heights of a certain population of corn plants follow a normal distribution with mean 145 cm

Question:

The heights of a certain population of corn plants follow a normal with mean 145 cm and standard deviation 22 cm. What percentage of the plant heights are
(a) 100 cm or more?
(b) 120 cm or less?
(c) Between 120 and 150 cm?
(d) Between 100 and 120 cm?
(e) Between 150 and 180 cm?
(f) 180 cm or more?
(g) 150 cm or less? Distribution
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