Carl has three lengths of cable, 5/6 yard long, 1/4 yard long, and 2/3 yard long. he needs at least 1 yard of cable. a: which two pieces together make a a length at least 1 yard and closest to 1 yard? b: if carl uses the two smallest pieces, how much more cable would he need? c: after carl has used 1 yard of cable, how much cable will he have left? explain how you found your answer.