Hey guys, need help with this one.

Let $\displaystyle \varepsilon = \mathbb{R}$, $\displaystyle A = \{ x \epsilon \mathbb{R} : x > 0 \}$ , $\displaystyle B = \{ x \epsilon \mathbb{R} : x > e \}$ , $\displaystyle C = \{ x \epsilon \mathbb{R} : x < \pi \}$ , where $\displaystyle e = 2.718$ and $\displaystyle \pi = 3.142$. Find the following sets:

$\displaystyle A \cup B$

a)

My Answer:$\displaystyle x > 0$

b)$\displaystyle B \cup C$

My Answer:$\displaystyle e < x < \pi$

c)$\displaystyle A \cap B$

My Answer:$\displaystyle x > e$

d)$\displaystyle B \cap C$

$\displaystyle e < x < \pi $

My Answer:

e)$\displaystyle \overline{A}$

My Answer:$\displaystyle x \leq 0$

f)$\displaystyle \overline{C}$

My Answer:$\displaystyle x \geq \pi$

$\displaystyle A \backslash B$

g)

My Answer:Not sure!

h)$\displaystyle B \backslash C$

My Answer:Not sure!

Any help and check on my answers would be much appreciated!