An audit of computer science students revealed the following information:

a$)$ Every student knows at least one programming language.

b$)62\%$ of all students know more than one one programming language.

c$)15\%$ of all computer science students know Python.

d$)$ Of the students who know know more than one programming language,

$20\%$ know Python.

Calculate the probability that a randomly selected computer science student

knows exactly one programming language, and that language is not Python.