If y = 4x, x = 2z, and z = 3a, what is the value of y - x in terms of a? A) -20a
B) -18a
C) 6a
D) 18a
E) 20a
With steps please

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.