Determine the standard direct labor hours per tune-up. (Round answer to 2 decimal places, e.g. 15. 10.) Standard direct labor hours per tune-up hours (b) The parts of this question must be completed in order. This part will be available when you complete the part above. (c) The parts of this question must be completed in order. This part will be available when you complete the part above. (d) The parts of this question must be completed in order. This part will he available when you complete the part above