(Algebra: multiply two matrices) Write a function to multiply two matrices a and b and save the result in c. The header of the function is const int N = 3 ; void multiplyMatrix(const double a[][N],...

(Algebra: multiply two matrices) Write a function to multiply two matrices a and b and save the result in c.

The header of the function is

const int N = 3 ;

void multiplyMatrix(const double a[][N],

const double b[][N], double c[][N]);

Each element cij is ai1 ×b1j + ai2 ×b2j + ai3 ×b3j.