Fill in the blanks for the rules for working with exponents:

a. If multiplying terms with the same base, you _________ their exponents.

b. If dividing terms with the same base, you _________ their exponents.

c. If raising a power to a power, you ___________ the exponents.

d. Any number raised to the 0 power is ________.

e. A negative exponent is defined as ________________________________.