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Level 1 Programming Exercises 11. Write a program that computes the standard deviation of Nreal numbers The standard deviation s is computed according to Aays and Collections The variable x is the average of Ninput values x, through xy. The program first prompts the user for Nand then declares an array of size N 12. Repeat Exercise 11, using an ArrayList. 13. Using the payscaleTable two-dimensional array from Section 10.4, write a program to find The average pay for every grade level The average pay for every step (ie., average of every column) You do not have to input the data values. Just assign the valhes to the payscaleTable array in the program.