For this problem, you have taken x as diameter, but answer is correct when you take x as radius. So, please improve your correct answer code.
middleAsColumn: Return all but first and last element as a column vector
Make a random, non-repeating vector.
Return the first and last character of a string
Is it a number?
02 - Vector Variables 4
Finding fourier transform of a given vector
Maximum value in a matrix
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