If $\left(G{,}^{*}\right)$ is a group such that $a^{*} b=b^{*}a$ for two elements $a$ and $b,$ then

In the truth table for the statement $\left(p\Rightarrow q\right)\iff \left(~p\vee q\right)$ the last column has the truth value in the following order is

If $\left(G{,}^{*}\right)$ is a group such that $(a* b{)}^2={\left(a^{*}a\right)}^{*}\left(b^{*} b\right)$ for all $a, b, \in G,$ then $G$ is

In a group $\left(G,*\right)$ if there exists an element $b$ such that $b^{*}a=b$ for all $a\in G\mathit{,}$ then order of the group is