(7 pts 1 pt for the header, 1 pt for variable declaration(s), 3 pts for computation with explicit typecasts, 2 pts for return value) Provide the function definition for calculate_parallel_resistance (). Also, be sure to provide the function header for calculate parallel resistance () . Recall: parallel_resistance 1 (1 / r1 1 / r2 1 / r3). Hint: don't forget to cast where appropriate