#### Answer

a.) Yes
b.) Yes

#### Work Step by Step

a.) The answer to the sum of any rational number will always equal a rational number since no irrational forms will appear
Ex.) $\frac{1}{2}$ + $\frac{2}{2}$ = $\frac{3}{2}$ [$\frac{2}{2}$ is the same as 1]
Fractions and whole numbers are rational numbers and the answer still equals a fraction.
b.) The sum of 2+ irrational numbers is still irrational numbers.
Ex.) $\sqrt 2$ + $\sqrt 2$ = 2 $\sqrt 2$
We are only adding the two irrational stars so there is still a square root in the sum making it irrational.