= (-6.507, -3.817, 7.506) 10-9
10.-10-9
E = -650.7a, - 381.7a, + 750.6a, kV/m
PRACTICE EXERCISE 4.1
Point charges 5 nC and -2 nC are located at (2,0, 4) and (-3, 0,5), respectively,
(a) Determine the force on a l nC point charge located at (1, -3,7).
(b) Find the electric field E at(1, -3, 7).
(a) -1.004a - 1.284a, + 1.4a, nN.
(b) - 1.004a, - 1.284a, + 1.4a, V/m.​

Then the answer would be d then

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

Ithink it is a. but i'm not 100 percent sure.