QUESTION: Fix punctuation: Unsure about which type of CB4 file you have Do you want to know exactly what it is who created it and how to open it
ANS: Unsure about which type of CB4 file you have? Do you want to know exactly what it is, who created it, and how to open it?

QUESTION: Fix punctuation: When he wins he starts over at the initial amount An amount equal to the initial amount is saved after every eventual win
ANS: When he wins he starts over at the initial amount. An amount equal to the initial amount is saved after every eventual win.

QUESTION: Fix punctuation: For these tasks students will be assigned a Debian developer acting as their mentor
ANS: For these tasks students will be assigned a Debian developer acting as their mentor.

QUESTION: Fix punctuation: 5 in beatings in imprisonments in riots in labors in watchings in fastings
ANS:
5 in beatings, in imprisonments, in riots, in labors, in watchings, in fastings;