QUES: They might also reflect cancer if it is causing the swelling of the liver andor gallbladder

correct the punctuation.

CORRECTED: They might also reflect cancer if it is causing the swelling of the liver and/or gallbladder.

QUES: Sapa is owned by the two Norwegian companies Orkla and Hydro and has 23000 employees in more than 40 countries

correct the punctuation.

CORRECTED: Sapa is owned by the two Norwegian companies Orkla and Hydro, and has 23,000 employees in more than 40 countries.

QUES: Before you can open a DATA5 file youll need to figure out what kind of file the DATA5 file extension refers to

correct the punctuation.

CORRECTED:
Before you can open a DATA5 file, you'll need to figure out what kind of file the DATA5 file extension refers to.