Graphing Quadratics: a) Graph the quadratic function y = x^2 - 4x + 3.
b) Identify the vertex and axis of symmetry of the quadratic function y = -2x^2 + 6x - 4.
c) Determine the x-intercepts (if any) of the quadratic function y = 2x^2 + 5x + 3.
d) Determine the y-intercept of the quadratic function y = -x^2 + 2x + 1.
e) Determine the maximum or minimum value of the quadratic function y = -3x^2 + 2x + 5.