\[\boxed{\text{994.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[\textbf{а)} - 1 < 3y - 5 < 1\]
\[4 < 3y < 6\ \ \ |\ :3\]
\[\frac{4}{3} < y < 2\]
\[\left( 1\frac{1}{3};2 \right).\]
\[\textbf{б)} - 2 \leq \frac{5 - 2b}{4} \leq 1\ \ \ \ \ | \cdot 4\]
\[- 8 \leq 5 - 2b \leq 4\]
\[- 13 \leq - 2b \leq - 1\ \ \ \ |\ :( - 2)\]
\[\frac{13}{2} \geq b \geq \frac{1}{2}\]
\[0,5 \leq b \leq 6,5\]
\[\lbrack 0,5;6,5\rbrack.\]