i just want to know if my answers are correct, but ones that are wrong please give explanation

At pH=7, what is the electric charge of the peptide: WEAREALLSPLEEPDEPRIVED 1 1 6 +3 0 Which statement is true about beta-sheets? In antiparallel beta-sheets, hydrogen bonds between adjixent strands are nearly perpendicular to the backbone of the strands Beta-sheets cannot contain Proline resildues Beta-sheets have yellow colors Antiparalle beta sheets are lews stebie than parallel beta theets The side chains of all amino adids point to the same side of the theet Which statement is NOT true about alpha-helices in proteins? Alpha-helices are typlically right-handed The rise of an alpha-helix is around 0.15nm Apha-helices must contain at least ane Proline residue Each carbonyl oxygen in residue number n forms a hydroben bond with hydrogen in the NH group in residue number n+4 Amino acid side chains extend outward and are perpendiculur to the apha-helix axis