C++ prgram on visual studio.

Part la: Value-Returning Function and Prototype See example 1 for an example that may help you solve this problem Complete this program, by adding a function called magO to calculate the magnitude of a vector. You'll need to add a prototype before main(), and the implementation (header & body) of the function after main(), reminder mag Sqrt (x t y 2) Calling it with something like vec length mag (x, y) Name your program functions1.c