During normal beating, a heart creates a maximum $4\mathrm{.}1-$mV potential across $0\mathrm{.}275$ m of a person$$s chest, creating a $0\mathrm{.}75-$Hz electromagnetic wave. During normal beating of the heart, the maximum value of the oscillating potential difference across $0\mathrm{.}275$ m of a person$$s chest is $4\mathrm{.}1$ mV$.$ This oscillating potential difference produces a $0\mathrm{.}75-$Hz electromagnetic wave. $$ Part $($a$)$

What is the maximum electric field strength, in volts per meter, of the electromagnetic wave?