1. may i borrow this book? - sure. just remember to give it back in a week. 2. may i borrow this book? - sure. just remember to give it back within a week.
in this short dialogue, does 'in' mean 'within'? or are both different?

a

explanation:

because i the point in view is between characters

(4) "oh, i've got better plans than that," laughed kerry. "i've got four firecrackers and two model rockets. care to join me in the backyard? "

this is the correct answer because of one simple word. "backyard"