Answer:
hello some parts of your question is missing attached below is the missing part
answer: the sum Given it can seen that according to the closure property of Rational numbers  the addition of two rational numbers will sum up to a rational number provided that the rational numbers ≠0 and a set of rational number is closed under the closures property rule i.e x + y = y + x
Step-by-step explanation:
using the closure property and based on the sum given :
From the sum Given it can seen that according to the closure property of Rational numbers  the addition of two rational numbers will sum up to a rational number provided that the rational numbers ≠0 and a set of rational number is closed under the closures property rule i.e x + y = y + x