(Solved): ( 5 pts) Consider all five-digit integers, i.e. the integers between 10,000 and 99,999 , inclusive. ...

( 5 pts) Consider all five-digit integers, i.e. the integers between 10,000 and 99,999 , inclusive. (a) How many of these integers have no repeating digits? For exnmple, 19,652 does sot have repeating digits, but 13,002 has. (b) How matry of these integers contain only odd digits? For example, 15,571 contains only odd digits but 12,655 does not. (c) How many of these integers have at least one even digit? For example, 36, 473 has at least one even digit.