Can someone help me with these ECG questions?

I don't know if it'll help you, but here it is: "uming the maximum ECG frequency is three beats per second and three-channel processing has a sampling frequency of 500Hz, 1500 samples per second and 9 pulses detected per second process are required." So, if you have a frequency of 60Hz, I think you should ume the minimum data sampling frequency of 3 x 60Hz = "180 sps".