Solution:
Clearly, (1,1),(2,2),(3,3) and (4,4) are not in R
So, it is not reflexive
We observe that (2,3)∈R but (3,2)∉R, it is not symmetric.
Clearly, (1,3)∈R and (3,1)∈R but (1,1)∉R. So, it is not transitive.
Since, (2,4) and (2,3) are in R. So, it is not a function.
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