Harry is $$5$$ years old now; he\textquotesingle ll be $$9$$ in $$4$$ years.  Gary is thus $$3\times9=27$$ years old 
Gary will be three times as old as Harry $$4$$ years from now. If Harry is $$5$$ years old now, how old will Gary be in $$4$$ years? 
Options:
(a) $$10$$ 
(b) $$23$$ 
(c) $$27$$ 
(d) $$31$$ 
(e) $$36$$ 