some questions for those who know

1) are the frames solid hardwood, or a combination of pine and hardwood. If all hardwood, what type is used?

2) what type of wood is used in the legs?

3) are the armrests sprung?

4) who does the detail carving? some of the pieces look done by hand, others look like machine work

5) what are the different types of leather, I'm having a hard time deciphering their website. ie aniline, waxed, grade?

thanks