(5 marks) Let
A
be the set of + ve real numbers, and
R
be the equivalence relation
R
where
xRy
if and only if "
x-y
" is an integer. Answer the following: \table[[Equivalence class of 1,],[Equivalence class of 2,],[Equivalence class of 2.3,],[Equivalence class of 5.1,],[\table[[How many equivalence],[classes are there?]],]]