Tenecia's corn plant was $\displaystyle{7}\frac{{1}}{{3}}\usepackage{cmbright}\Huge\$ inches tall at the end of Week 1. The corn plant was $\displaystyle{19}\frac{{1}}{{2}}\usepackage{cmbright}\Huge\$ inches tall at the end of Week 2. How many inches did the corn plant grow during Week 2?