4.) Given C(x,y) mean that person x has chatted with person y.Express the statement “There is a student in this class who haschatted with exactly one other student using quantifiers.
5.) Given E(x,y) mean that person x has sent e-mail to person y.Express the statement “No student in this class has sent email toexactly two other students in this class” using quantifiers.
6.) Let Q(x,y) be the predicate that x has taken y, where xranges over students in this class and y ranges over math classesat this school. Express the statement “Every student in this classhas taken exactly two math classes at
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