Write a function that calculates two averages (using function_1) and returns the sum of the two averages.
a) def calculate_averages(x, y): return (function_1(x) + function_1(y)) / 2
b) def calculate_averages(x, y): return function_1(x) + function_1(y)
c) def calculate_averages(x, y): return 2 (function_1(x) + function_1(y))
d) def calculate_averages(x, y): return function_1(x) function_1(y)
