write true or false of for the following sentence 1. the rational numbers are associative under subtraction 2. the rational number are assocative and the multiplication 3.the rational number or associative under multiplication 4.the rational number are associative under division 5. the rational number are closed under addition 6.rational number are closed under multiplication number are closed under subtraction 7.the rational number are closed under division 8.one is the multiplicative identity for the set of rational number 9.0 is the additive identity for the set of rational number.​