Write a function, solution, that given an integer N, returns the maximum possible value obtained by inserting '5' digit inside the decimal representation of integer N.

Examples.

1. Given N = 268, the function should return 5268
2. Given N = 670, the function should return 6750
3. Given N = 0, the function should return 50
4. Given N = -999, the function should return -5999

Assume that:

• N is an integer within the range of [-8000 - 8000]

Please help me understand this, in javascript preferably