MATLAB Coding for Probability Question

Hi i am trying to find out the MATLAB coding for this question but i am unable to program it as i am unsure how to do probability on MATLAB.

Any help with explanation would be great. Thank you so much:)

Qn:

The probability that a certain kind of memory chip will survive a shock test is 85%.If the tests are independent and to be follows Binomial Distributions.

The input parameters to be use for the following:

𝑁= 9 & 𝑋 = 31

1)What is the probability that exactly 2 of the next 𝑁 memory chip tested survive?

2)What is the probability that at least 2 of the next 𝑁 memory chip tested survive?

3)Find the probability that more than 𝑋 of the next 100 memory chip tested not survive?