1. A computer has been enhanced by using a binary-decimal arithmetic instruction. When an accounting computation is run in binary-decimal- arithmetic it is 80 times faster than the normal mode of arithmetic instructions. (1) Assume the percentage of time that could be spent using binary-decimal arithmetic is the percentage of arithmetic operation in the accounting computation, what percentage of binary-decimal mode is needed to achieve a speed of 2. (2) Assume arithmetic operation takes 90% the accounting computation, what percentage of binary-decimal mode is needed to achieve 60% the maximum speedup attainable from using binary-decimal arithmetic