Ireally need ! fast ! 1.) classify the sequence as arithmetic, geometric, or neither. if there is not enough information to classify the sequence, choose not enough information. (3,-1,1/3,-1/9) 2.) write the first five terms of the geometric sequence with a1=-2 and common t=ratio r=-5/2 a.) (-2,-9/2,-7,-19/2) b.) (-2,-5,-25/2,-125/4) c.) (2,-5,25/2,-125/4) d.) (-2,5,-25/2,125/4)