is this correct for (a) and (b)?

2. For Parts (a)-(b), find parametric equations for the described curve, and circle your final answer. (a) The line segment starting at (-1, 2, 0) and ending at (4, 4, 4). Vector V = ( 4 - ( 1) ) it ( 4 - 2) 3 + (4- 0 ) K = 57 + 25 + 4K 5 + 2 + 4 X= 5+t , y= 5+2t, z= 2+4t (b) The circle of radius 4 in the plane a = 3, having its center at the point (3, 0, 0), and oriented as shown in the diagram to the right. x= 3, y= 4cost, z = 4sint, for ast= 27 4 tant