THE NORMAL DISTRIBUTION- please help i have no idea how to work it out and my exam

0987

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is next week :/ ....? Q. the random variable X is normally distributed with mean= 177.0 and standard deviation = 6.4
(a) find P( 66<X<185)

(b) it is suggested that X might be a suitable random variable to model height in cm of adult males give 2 reasons why this is a sensible suggestion

can anybody show me the steps to working these out please ....
thank you soo much !
 
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