4. Evaluate the MAD-1 Problem on Page 649 of your textbook. What is a) the non value-added lead time in the process of checking patients in until their arrival in the clinical area and b) the value added ratio of the entire process (rounded to 1 decimal place), respectively?

A) 60 min and 25.0%

B) 45 min and 43.8%

C) 55 min and 31.3%

D) 50 min and 37.5% PLEASE SHOW ALL THE STEPS AND FORMULA PLEASE WRITE CLEARLY