Question 21
A technology training institute offers an advanced certification program consisting of 10 modules. The program is divided into terms of 4 months. Students may enroll in any number of modules in a term, but a module can only be taken after completing all of its prerequisite modules. The prerequisite structure is given below.
There is no restriction on the number of modules a student can take in a term. The minimum number of terms required to complete all 10 modules is ___.