How can I visualize the bondangles phi and psi better and assign them accordingly to an aminoacid

A peptide has the sequence Glu-His–Trp–Ser-Gly–Leu-Arg-Pro–Gly The pK, values for the peptide's side chains, terminal amino groups, and carboxyl groups are provided in the table. Amino acid Amino pKa Carboxyl pKa Side-chain pKa glutamate 9.60 2.34 4.25 histidine 9.17 1.82 6.00 tryptophan 9.39 2.38 serine 9.15 2.21 glycine 9.60 2.34 leucine 9.60 2.36 arginine 9.04 2.17 12.48 proline 10.96 1.99 Calculate the net charge of the molecule at pH 3. net charge at pH 3:

Name four major groups of amino acids, categorizedby the properties of their R groups. Explain how thechemical properties of each group affect protein shape.

Consider the following peptide: Lys-His-Asp-Glu-Phe-Cys-Ala-Asp-His-Arg What is the net charge of this peptide at pH = 1? What is the net charge of this peptide at pH = 14?

Does amino acid sequence or amino acid composition have more of an impacts the protien structure?