Question $1$: A software development company conducts code reviews to identify bugs in its programs. The probability of finding a bug in a code review is $25\%.$ The company performs bode reviews one by one until a bug$-$free code is identified.

What is the distribution of $x$ where $x$ represents the number of code reviews the company has to conduct until it identifies a bug$-$free code?

What is the probability that the company will identify a bug$-$free code within the first four code reviews?