#### Answer

a)mean=98.6
b)mean is not 98.6
c)You can reject the null hypothesis or fail to reject the null hypothesis.
d)No.

#### Work Step by Step

a) Because of the null hypothesis statement the mean is the given value:mean=98.6.
b) Because of the alternative hypothesis statement the mean is not equal to the given value:mean is not 98.6.
c)You can reject the null hypothesis or fail to reject the null hypothesis.
d) No, because here the original claim will be the null hypothesis. Hence we can either reject it or fail to reject it but there is no evidence against or supporting the statement