C programming.

Write a program that carries out the following:

1.) Data Entry Step: reads N ordered pairs of data (x_i,y_i) into a pair of arrays x[] and y[]. Query the user for a value for N in advance; N will not be greater than 100.

2.) Analysis Step: using the obtained data and the formulas above, calculates the parameters m and b of the least-squares fit to the data and prints those values to the screen in an appropriate way.

3.) Predictive Step: reads in a series of x values (number not known in advance, but no more than 100 values) until the user enters the sentinel value -999. Then (after all values are input) the program prints out a table of values for the least-fit line y=mx+b in two tab-separated columns labeled x and y, and computes and prints out the centroid the half-way point on the line segment between the extreme points on the line segment entered.