Hello guys, I need help solving the following question:

The sum of the first three terms in a geometric progression is 195. The difference (?) between the first and second term is larger in 75 than the third term. Find the first term and the common ratio of the given progression.

That is:

I a1 + a2 + a3 = 195

II a2 - a1 = a3 + 75

a1=? q=?

Could I please have the full solution? (because I reached a stage where I couldn't continue and didn't know what to do next)

Thanks in advance.