Answer Happy

Suppose 84% of smartphones sold at a retail outlet requireupgrades. A random sample of 29 smartphones is selected. Assumingindependence, use the binomial formula or software (recommended) toanswer the following questions. What is the probability that, ofthe 29 smartphones selected:
(Report probabilities accurate to at least 4 decimalplaces.)
a) exactly 24 require upgrades? (Answer Here)
b) exactly 3 do not require upgrades? (Answer Here)
c) all of them require upgrades? (Answer Here)
d) at most 24 require upgrades? (Answer Here)
e) at least 22 require upgrades? (Answer Here)
f) more than half require upgrades? (Answer Here)
g) at least 22 but no more than 26 requireupgrades? (Answer Here)
h) less than 20 or more than 25 require upgrades? (AnswerHere)
Calculate the mean and standard deviation of smartphones thatrequire upgrades. Round to 2 decimal places.
Mean =  (Answer Here)
Standard Deviation = (Answer Here)
If you expect to find exactly 78 smartphones that requireupgrades, how large a sample should you select?
Report the minimum sample size required as an integer.
(Answer Here)