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Create a function first ( c ) which accepts as input any list c , and outputs the first element in the list c .

Create a function first (c) which accepts as input any list c, and outputs the first element in the list c.
Define a function first_last (c) which accepts as input a list c, and outputs two values, the first element and the last element of c(in that order).
Define a function middle (c) which accepts as input a list c, and outputs a list which is the same as c except that the first element and the last element have been removed. In other words, the function call middle (c) should drop the first and last elements of the list c and return the resulting list.
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