Measuring the human heart beat, which has a maximum rate at $300$ beats per minute.

$($A$)$ what would be a MINIMUM frequency to sample this data, according to Nyquist sampling theory? $($enter your number XXX in units of Hz$,$ e$.$g$.$ if you enter $"9",$ it represents $9$ Hz$)$

$($B$)$ what would be a SUGGESTED frequency to sample this data? $($enter your number XXX in units of Hz$,$ e$.$g$.$ if you enter $"9",$ it represents $9$ Hz$)$