Help with two problems

Y=4sin(X)

Z=Y+3X^2

1. Create user defined functions that will calculate Y and Z for any array of X values.
2. Generate a series of 5 random integer values between 1 and 10 for the X array.
3. Calculate Y and Z using your UDFs
4. Calculate the sum, median, mean and standard deviation for Z

A = [5 -10 1:2 8 0.5:1 0 5]

1. Write a program to find the largest element in an nxm matrix and its index ( m,n >1)
2. You can assume that there is only one largest element in the matrix (no repeats)
3. The user should be prompted to enter the matrix in the Command Window
4. The answer should be displayed in the Command Window within text
5. You can NOT use the built in max function

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer