A wall measures 8 1/2 feet by 12 3/4 feet. If a gallon of paint covers about 150 square feet, will one gallon of paint be enough to cover the wall? Explain.

a) Yes, one gallon of paint will be enough.
b) No, one gallon of paint will not be enough.
c) It's difficult to estimate with the given information.
d) One gallon may be enough, but it's uncertain.