In this problem a person is placed at the center of a 7 meter long bridge. Each step, the person moves 1 meter either forward or backward at random.

1. Write a program that determines how many steps the person will walk before taking a step off the bridge. Have the program average 50 trials and report the average and greatest number of steps. Your C++ program should use top-down design and functions to solve the problem.
2. Display the position of the person on the bridge at each stage of one bridge walk

   For example,

   	Step 0:	 |---*---|
   	Step 1:	 |--*----|
   	Step 2:	 |-*-----|
   	Step 3:	 |--*----|
   	   . . . 

   
   
3. Print a table of bridge length vs. average number of steps taken to get off.
   Use 50 trials for each bridge length and try odd lengths from 5 to 21 meters long.
   For example,
   

   	        Length		        Average Number of Steps 
   		5			5.6
   		7			7.2
   		9			8.0
   		...			...
   		21			37.5

   What is the relationship between the length of the bridge and the average number of steps taken to get off?