Write the equations of the lines that form the four sides of the right trapezoid with vertices at (−16, 7), (−16, −4), (5, −4), and (16, 7).
line passing through (−16, 7) and (−16, −4) = ________
line passing through (−16, −4) and (5, −4) = _______
line passing through (5, −4) and (16, 7) = _________
line passing through (16, 7) and (−16, 7) = _________