question: before you can open a s02 file, you'll need to figure out what kind of file the s02 file extension refers to.
Capitalize this past sentence correctly.
A: Before you can open a S02 file, you'll need to figure out what kind of file the S02 file extension refers to.

question: currently there are no restrictions as to the amount of cumulative superenalotto.
Capitalize this past sentence correctly.
A: Currently there are no restrictions as to the amount of cumulative SuperEnalotto.

question: chemicals: accumulation of chemicals from everyday products, e.g. brominated flame retardants, pcb, and dioxin.
Capitalize this past sentence correctly.
A: Chemicals: Accumulation of chemicals from everyday products, e.g. brominated flame retardants, PCB, and dioxin.