In which of the following sentence infinitive is used

The book "Modi's Midas Touch in Foreign Policy" was written by

Introducing a girl, Raj said, "Her mother is the only daughter of my mother-in-law". How is Raj related to the girl

Shakespeare's Sonnet No 116 deals with 

The author of the story "Reflowering" is

You bleached our souls with impurities 

You bathed our hearts

The above lines are taken from the poem