#1
Is a iv-i cadence in a minor key still considered a plagal cadence? I'm pretty sure it is but I just want a second opinion. I don't see why it wouldnt.
#4
IV - I
IV- i
iv - I
iv - i
ii7 - i
ii7 - I
N6 - i
N6 - I

Are of the above can be described as Plagal cadences.