A customer service department has the following resolution response time data: Average Response Time First contact 0.25 hr. Service scheduling 0.50 hr. Wait for service 24.00 hrs. Service 1.50 hrs. Total resolution time 26.25 hrs. What is the value-added ratio (rounded to one decimal place) in this process?a. 91.4%b. 28.6%c. 5.7%d. 8.6%