What is responsible for the digestion? mechanical digestion? chemical digestion? if chemical what en

Ok so I have some anatomy homework here and it's a pain to do, wondering if anyone can help?"Explain how the macromolecules will be digested in the digested tract?"
Who is being digested (identify the macromolecule(s))
What is responsible for the digestion? mechanical digestion? chemical digestion? if chemical what enzymes or enzyme helpers are responsible?
What part of the digestive tract does the digestion take place and where do the enzymes/enzyme helpers comes from?

Serving size 1 bar
Calories 270
Total fat 6g
Sat Fat. 4g
Transfat 0g
Protein 30g
Total carbs 26g
Fiber 2g
Sugars* 9g

*lactose and sucrose
Thanks! Just wondering here but is this by chance Quantumpi? You know who you are R.S....>_>