1 For each of the following sets G and operations state with justification whether or not a is a closed binary operation b is associative c there is an identity element d all elements have an inverse e G under is a group R 0 and f g x f x g x i G is the set of functions f R o 20 Here Ro is the set of non negative real numbers ii G is the set of functions f RR and f g x f x g x