Create a time variable so you can plot the magnitude of the ECG signal $(mV)$ as a function of time in seconds?

a$.$ HINT: to properly plot, the time vector and data vector must be the same length

What is the size of your time variable? Write this as a comment in your $m$ file

Plot your ECG signal as a function of time in sec$.$ Code this in your $.m$ file so that the TA will see the figure appear when the code is run.