Fill in the blanks to rewrite the given statement.
3. For all real numbers x, if x is an integer then x is a rational number.
a. If a real number is an integer, then ______.
b. For all integers x, ______.
c. If x ______, then ______.
d. All integers x are ______.
4. All real numbers have squares that are not equal to -1.
a. Every real number has ______.
b. For all real numbers r, there is ______ for r.
c. For all real numbers r, there is a real number s such that ______.
5. There is a positive integer whose square is equal to itself.
a. Some ______ has the property that its ______.
b. There is a real number r such that the square of r is ______.
c. There is a real number r with the property that for every real number s ______.