Answer
See the picture.
Work Step by Step
It is a binomial probability distribution in which success means rolling a 5 or 6 in a dice. So:
$p=0.3333$ (item (a)) and $n=12$
In MINITAB, enter the sequence 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 in C1.
Select Calc -> Probability Distributions -> Binomial
Select Probability
Enter 12 in "Number of trials" and 0.3333 in "Evernt Probability"
Enter C1 in "Input column"
Click Ok.
The probability Density Function will be given.
