$(4\text{'})$ Determine whether the relation $R$ on the set of all Web pages is reflexive, symmetric,

antisymmetric, and$/$or transitive, where $(a,b)inR$ if and only if

a$)$ everyone who has visited Web page a has also visited Web page $b.$

b$)$ there are no common links found on both Web page a and Web page $b.$

c$)$ there is at least one common link on Web page a and Web page $b.$

d$)$ there is a Web page that includes links to both Web page a and Web page $b.$