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Check the following relations R and S fo...

Check the following relations `R` and `S` for reflexivity, symmetry and transitivity: (i)`a R b` iff `b` is divisible by `a ,\ a ,\ b in N` (ii) `l_1` `S\ l_2` iff `l_1_|_l_2` , where `l_1` and `l_2` are straight lines in a plane.

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