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Course 161/2S3, Tutorial Sheet 3 • Write a C program which uses while loops to calculate the mean and variance of N numbers. Modify the program so that it uses for loops rather than while loops. Note The mean, x̄ of the numbers xi is x̄ = −1 1 NX xi N i=0 The standard deviation σ of the numbers is. σ= v u u t −1 1 NX (xi − x̄)2 N i=0 ! • Write a C program which calculates the sum of the absolute values of N numbers. Your program should read in N numbers first. 1