Here are the results. All done on newsprint 50x70 cm using brown charcoal stick.
I was quite pleased with the results after such a long time.... I didn't do any measurements during the sketching time ... concentrated more on catching the pose and filling the page so now looking I find some lack of proportions... rather smallish heads and larger bodies.....My favorite is the last one although I had a problem with the fore handed arm... either she moved or I moved my eye view.... probably the later. Really had a good time and hope they have another session soon.