C Programming Help!! Define a structure to represent a 3-dimensional vector, then implement following functions. You must implement them as separate c functions and use the vector structure as input/output whenever it is appropriate.

a. Write a function that returns the summation of two vectors.

b. Write a function that returns the magnitude of a vector.

c. Write a function that returns the dot product of two vectors.

d. Write a function that returns the cross product of two vectors.