Assume that a function named swapdoubles has been defined and is available for use in this exercise: that function receives two variables of type double and exchanges their values. write the definition of a function named sort3 that is passed three double variables. the function returns nothing but modifies the values of these variables so they are in sorted order. so, if a, b and c have (respectively) the values 3.14, 2.71, and 3.04, and the invocation sort3(a, b,c) is made, then upon return, the values of a, b and c will be 2.71, 3.04, and 3.14 respectively.