If 'a' and 'b' are any two integers and a+(b+c) = (a+b)+c. The property used here is
If 'a' and 'b' are any two integers, then a × (b + c) = (a × b) + (a × c). The property used here is ___
If 'a' and 'b' are any two integers and a+(b+c) = (a+b)+c. The property used here is __