21. Parametrizationming the triangle formed by segments from points A to B to C to A where A = (2,1) B = (4,3), C = (5,2) In problems 22 - 23, find the equation of the tangent line to the curve at the given value of t. 22. x = 2+Int, y = 4+3 -t t= 1 23. x = t+ et, y = tet t=2