In a recent year, the scores for the reading portion of a test were normally distributed, with a mean of 22.6 and a standard deviation of 6.2. Complete parts (a) through (d) below. (a) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is less than 21. The probability of a student scoring less than 21 is (Round to four decimal places as needed.)

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