question: you will then be able to download your favourite games.
Capitalize this past sentence correctly.
A: You will then be able to download your favourite games.

question: the watch is water resistant to 3 atm and has been fitted with mineral crystal.
Capitalize this past sentence correctly.
A: The watch is water resistant to 3 ATM and has been fitted with mineral crystal.

question: polymerase chain reaction (pcr) testing, which isolates the dna of the causative agent, is now commonly employed for confirmation.
Capitalize this past sentence correctly.

A: Polymerase Chain Reaction (PCR) testing, which isolates the DNA of the causative agent, is now commonly employed for confirmation.