Afly starts out 2 meters from a lightbulb, flies closer to the light, then farther away (2 meters again). at this point the fly goes toward the bulb again, but hits the bulb and then finally flies away.
find a function (it may be piecewise) that gives the distance of the bug from the light as a function of time. [there is more than one solution here—you have lots of freedom with what your function can be, but it must satisfy the situational requirements given.] demonstrate that your function does satisfy the situational requirements.