Please capitalize where necessary: a product that brightens the color and check for leaks. keeping light.
A: A product that brightens the color and check for leaks. Keeping light.

Please capitalize where necessary: we drove to skutvik to see the new shop. the fog laid so low, that we could not see the mountain hamary skaftet.
A: We drove to Skutvik to see the new shop. The fog laid so low, that we could not see the mountain Hamary skaftet.

Please capitalize where necessary: given this fact, it is highly unlikely that any perpetrators of a hoax in 1st century judea would elect women to be their primary witnesses.
A: Given this fact, it is highly unlikely that any perpetrators of a hoax in 1st Century Judea would elect women to be their primary witnesses.

Please capitalize where necessary: stand with a dumbbell in one arm stretched above your head while your other hand supports your elbow.
A:
Stand with a dumbbell in one arm stretched above your head while your other hand supports your elbow.