Q2-x

Match the pairs in the following questions:

$$\begin{array}{|ll|ll|}\hline (a) & \text{Groups} & (p) & \text{Associativity} \\\hline (b) & \text{Semigroups} & (q) & \text{Identity} \\\hline (c) & \text{Monoids} & (r) & \text{Commutativity} \\\hline (d) & \text{Abelian groups} & (s) & \text{Left inverse} \\\hline \end{array}$$