Given W = D * U for an Effort-Driven Task

Short Answer

Given W = D * U for an effort-driven task. Assume an 8-hour workday. Initially, task R was assigned to Bob. Bob was expected to accomplish 32 hours of work in five days. Bob was expected to be 100% available to work on task R during the entire five days. However, Bob left the company and will be replaced by Sam. Sam's efficiency rate is 90%. If Sam is only 70% available, Sam will require __________ hours to complete task R.