a) \( A = \{ x \in \mathbb{R} \mid 2 \leq x \leq 7 \} \)
b) \( B = \{ x \in \mathbb{R} \mid x \geq -5 \} \)
c) \( C = \{ x \in \mathbb{R} \mid -7 \leq x \leq 0 \} \)
g) \( G = \{ x \in \mathbb{R} \mid x^2 - 2 \} \)
1) \( 1 = \{ x \in \mathbb{R} \mid x > 1.3 \} \)