MODIFYFind the low point on the graph of $\displaystyle{y}={4}{\cos{{\left(\pi{x}\right)}}}\usepackage{cmbright}\Huge\$ on the interval $\displaystyle{\left[-\frac{{1}}{{2}},\frac{{5}}{{2}}\right]}\usepackage{cmbright}\Huge\$ and plot it below.