145-- The relation $R = \{(a,b) : |2a - b| \leq 3\}$ is defined on the set $A = \{1, 2, 3, 5, 7\}$. How many members does this relation have? (1) $6$ (2) $7$ (3) $8$ (4) $9$
\textbf{145--} The relation $R = \{(a,b) : |2a - b| \leq 3\}$ is defined on the set $A = \{1, 2, 3, 5, 7\}$. How many members does this relation have?
(1) $6$ \qquad (2) $7$ \qquad (3) $8$ \qquad (4) $9$