According to Money magazine, Maryland had the highest median annual household income of any state in 2018 at $75,847.† A

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According to Money magazine, Maryland had the highest median
annual household income of any state in 2018 at $75,847.† Assume
that annual household income in Maryland follows a normal
distribution with a median of $75,847 and standard deviation of
$33,800.
(a) What is the probability that a household in Maryland has an
annual income of $90,000 or more? (Round your answer to four
decimal places.)
(b) What is the probability that a household in Maryland has an
annual income of $30,000 or less? (Round your answer to four
decimal places.)
(c) What is the probability that a household in Maryland has an
annual income between $60,000 and $70,000? (Round your answer to
four decimal places.)
(d) What is the annual income (in $) of a household in the
ninety-first percentile of annual household income in Maryland?
(Round your answer to the nearest cent.) $