Yes.
A mixed number is a whole number plus a fraction.
A mixed number is a rational number. Mixed numbers are not a rational number but many of them.
Because they can be expressed as a fraction
yes
All rational numbers are not whole numbers, as rational numbers can include fractions.
No, the set of mixed numbers is a subset of the set of rational numbers. For example the mixed number 1 ¼ is the same as the improper fraction 5/4 [a rational number]. Note that it is a subset, because integers are also rational numbers, but a mixed number will not be an integer. Also, any fraction between 0 and 1 will not be a mixed number.
Not only could they be, but they always are.
The set of rational numbers includes the set of natural numbers but they are not the same. All natural numbers are rational, not all rational numbers are natural.
Yes. Rational numbers are numbers that can be written as a fraction. All rationals are real.
All rational and irrational numbers are real numbers.
Because they can be expressed as fractions
Yes, the number 88 is rational. A "rational number" is any number that can be expressed as a ratio of integers. That is A/B where A and B are integers, and not zero. Rational numbers include all positive and negative integers and all positive and negative fractions (and mixed numbers when expressed as a fraction).
The set of rational numbers includes all whole numbers, so SOME rational numbers will also be whole number. But not all rational numbers are whole numbers. So, as a rule, no, rational numbers are not whole numbers.