A high school math department offers a total of 5 classes: MTH01, MTH02, MTH03, MTH04, and MTH05. However, the following courses cannot be taught at the same time due to staffing limits: MTH01 conflicts with MTH02, MTH05 MTH02 conflicts with MTH01, MTH03 MTH03 conflicts with MTH02, MTH04 MTH04 conflicts with MTH03, MTH05 MTH05 conflicts with MTH01, MTH04 What is the minimum number of time slots needed to teach these classes?

Group of answer choices

3

4

5

6