In human digestion, where does the digestion of protein begin?

Draw out each of the peptide fragments that would be generated if the peptide is treated with trypsin.

Draw out the resulting peptide fragments that would be generated if the peptide is treated with chymotrypsin.

What would the resulting peptide fragments be if the following peptide were treated with excess Pepsin? 

                                H—E—L—P—M—E—P—L—E—A—S—E

Which is the expected result of chymotrypsin cleavage of the following peptide? 

                            Lys—Gly—Phe—Thr—Tyr—Pro—Asn—Trp—Ser—Tyr—Phe