Answer:
48 hours ; 4 volunteers
Step-by-step explanation:
Maurice ( 1 volunteer) and three other volunteers = 4 total of volunteers working at the hospital. Each volunteer works always the same number of hours, and each volunteer works 12 hours per week.
4 volunteers X 12 hours a week = 48 volunteer hours a week.
48 is the total of volunteer hours the 4 volunteers work per week.