question: it is natural that your opponent will be the computer.
Capitalize this past sentence correctly.
A: It is natural that your opponent will be the computer.

question: if221 gross income by region, income interval, age and sex (discontinued) (1983-2005)
Capitalize this past sentence correctly.
A: IF221 Gross income by region, income interval, age and sex (DISCONTINUED) (1983-2005)

question: cook until cheese is melted and slice each into 4 pieces.
Capitalize this past sentence correctly.
A: Cook until cheese is melted and slice each into 4 pieces.