U=A set of natural numbers less than 30 A= A set of composite numbers between 5 and 30 that are divisible by 5 B= A set of prime numbers between 10 and 25 C= A set of odd natural numbers less than 25 D= A set of natural numbers that are multiples of 4 less than 25 E= A set of natural numbers that are multiples of 6 and less than 25 How many subsets do set D has?​