Your teacher makes the following statement, “ the set of whole numbers is closed under multiplication, but the set of irrational numbers is not closed under multiplication. “ ( even if you only answer 1 that’d be great ) (a) what does it mean for a set of numbers to be closed under multiplication? (b) what example could you use to support the statement that whole numbers are closed under multiplication? explain (c) what example could you use to support the statement that irrational numbers are not closed under multiplication? explain.