Find the reference number for each value of t. 271' a If t = , ( ) 3 the reference number is f = :] 371' b If t = , ( ) 4 the reference number is E = :] 21f If t = , (C) 3 the reference number is E = :] 1371' If = (d) t 4 , the reference number is f = :] ( )lft 7'\" e = , 6 the reference number is E = :] 1171' f If t = , ( ) 3 the reference number is f H