Community Answer

a) Q is not taller than Q. So R is not reflexive.  Q is taller than b does not imply b is taller than ​​​​​Q. So R is not symmetric. Hence R is not antisymmetric also. Let aRb and bRc.  Q is taller than b and b is taller than ( implies Q is taller than (. So R is transitive. b) a and a born on the same day. So R is reflexive. a and b born on the same day implies b and a born on the same day. So R is symmetric. Let aRb and bRa. But a may not be equal to b. So R is not antisymmet ... See the full answer