Let D be the triangle in the xy plane with vertices at (-2, 2), (1, 0), and (3, 3). Describe the boundary OD as a piecewise smooth curve, oriented counterclockwise. (Use t as a parameter. Begin the curve at point (-2, 2).)

t = t E [0, 1]
t E [1, 2]
t E [2, 3]