QUESTION: Fix punctuation: Its easy to add a little colour to Chrome
ANS: It's easy to add a little colour to Chrome.

QUESTION: Fix punctuation: Micrometre per second ms
ANS: Micrometre per second (m/s)

QUESTION: Fix punctuation: The problem of squaring the circle namely constructing a square with the same area as a given circle using ruler and compasses alone had been one of the classical problems of Greek mathematics
ANS: The problem of squaring the circle , namely constructing a square with the same area as a given circle using ruler and compasses alone, had been one of the classical problems of Greek mathematics.

QUESTION: Fix punctuation: Arthur was educated at Loreto Convent where like his sister he showed considerable musical talent winning a prize for his playing of the piano
ANS:
Arthur was educated at Loreto Convent where, like his sister, he showed considerable musical talent, winning a prize for his playing of the piano.