4. (a) Show that when 1: 2 1, U S 111(3)- 9: {This should be very short.) [b] Use your knowledge of integrals to explain why, when a: 2 1, 'tl '1 1 dt S f dt. /1 t 1 a (c) Evaluate the integrals in (b} and combine this with (a) (and the squeeze theorem) to show that lim 111(3) = :cwo a: ((1) Mat does part ((1) say about the relative speeds with which 111(93] and a: approach 00 as :1: approaches 00? 0