> restart; with(plots):

> Q1:= plottools[cuboid] ([0,0,0], [1,4,3],

  color = blue,
  thickness = 1):
Q2:= plottools[cuboid] ([1,4,3], [3,7,5],
  color = maroon,
  thickness = 1):
v1:= arrow  (<0,0,0>, <1,4,3>,
  shape = arrow,
  color = black,
  thickness = 2):
v2:= arrow  (<1,4,3>, <2,3,2>,
  shape = arrow,
  color = red,
  thickness = 2):
v3:= arrow  (<0,0,0>, <3,7,5>,
  shape = arrow,
  color = magenta,
  head_length = 1,
  thickness = 2):

display([v1, v2, v3, Q1, Q2],
  style = wireframe,
  thickness = 2,
  size = [450, 450],
  axes = normal,
  axesfont = [Courier, normal, 10],
  labels = [x1, x2, x3],
  labelfont = [Courier, normal, 12],
  orientation = [-41, 60]);

> display([v1, v2, v3, Q1],

  style = wireframe,
  size = [450, 450],
  axes = normal,
  axesfont = [Courier, normal, 10],
  labels = [x1, "", x3],
  labelfont = [Courier, normal, 12],
  orientation = [-90, 90]);