Here in this voice leading exercise I am doing I have 73 going to 63 in the figured bass but I am not sure what this means for the voice leading. I understand the 7-6 means that the 7th above the bass becomes a 6th above the bass but how would the 73 chord be spelt in the first place? I have doubled the C in my solution to the exercise but perhaps I should have had a 5th or kept the 6th coming from the previous chord?
Also, on a separate note, After a ii6 chord would going to a IV7 not be going backwards? From my understanding, IV usually comes before ii6 not after...