Given inequation,
\[\begin{array}{*{35}{l}}
5x\text{ }\text{ }3\text{ }\le \text{ }5\text{ }+\text{ }3x\text{ }\le \text{ }4x\text{ }+\text{ }2 \\
5x\text{ }\text{ }3\text{ }\le \text{ }5\text{ }+\text{ }3x\text{ }and\text{ }5\text{ }+\text{ }3x\text{ }\le \text{ }4x\text{ }+\text{ }2 \\
2x\text{ }\le \text{ }8\text{ }and\text{ }-\text{ }x\text{ }\le \text{ }-\text{ }3 \\
x\text{ }\le \text{ }4\text{ }and\text{ }x\text{ }\le \text{ }3 \\
\end{array}\]
Consequently, \[3\text{ }\le \text{ }x\text{ }\le \text{ }4.\]
Consequently, we have \[a\text{ }=\text{ }3\text{ }and\text{ }b\text{ }=\text{ }4.\]