Y- 4. Consider the following expression in terms of y ("gamma"): (7-3) -(Y-3)* a. Present five variations of a Python function which can evaluate this expression. All these five variations should yield the same result, but each one should perform its unique set of operations. b. Count the number of basic operations which are involved in each version of this function (additions, subtractions, multiplications, divisions, etc.). If any special operations are also involved (exponentials, logarithms, etc.), keep track of them as well. C. Employing the appropriate library in Python, determine a representative time which is associated with the computation of each one of these variants. d. Do the times of all these variants make sense once they are compared with their respective operations? Briefly explain yourself