The position r of a particle moving in an xy plane is given by 7 = (4.0013 - 1.00t)i + (5.00 - 1.0014) / with 7 in meters and tin seconds. In unit-vector notation, calculate (a) r, (b) , and (c) a fort = 3.00 s. (d) What is the angle between the positive direction of the x axis and a line tangent to the particle's path at t = 3.00 s? Give your answer in the range of (-180; 1809). (a) Number it i Units (b) Number i it i Units (c) Number i it i Units (d) Number i Units