Will the light from two very close stars produce an interference pattern?
a. yes; intense light from two nearby stars creates very obvious interference patterns.
b. no; the light from two different incandescent objects is not coherent, and is emitted in a range of frequencies.
c. no; the light is too intense to produce a discernable interference pattern, it gets washed out.
d. yes; if they are very close to each other, the light has a large overlapping area and in this area you will see interference.

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. 

Your answer is 120miles