I wanted to write a short harmony exercise in 4 parts where there is a brief tonicization or modulation to the relative minor and then back to the original major key. I am not sure if I have labelled the chords correctly in bar 3 and if I should name the soprano as ^5 in d minor or as ^3 in the original key and I also am not sure about the return to F major in bar 4. The move from the A to Bb is like a deceptive motion but I never resolved the temporary leading tone in the A chord and am not sure if this is a problem. It sounds fine to me but would it perhaps be better to lead the C# and E in the tenor and alto both to D in the Bb chord of bar 4? This will reduce the smoothness of the voice leading I have now so not sure. If anyone has some other tips, please do tell.