Either Ma’ am Muarip and Sir Aguilar are teaching General Mathematics or their substitutes are. If both of them are, then an Engineering student will observe. But the Education student who majors in math will observe if the substitutes are teaching. Therefore, either the Engineering student or the Math major student will assist.
M – Ma’ am Muarip A – Sir Aguilar
( M ^ A) v S
Given
( M ^ A)- > En
Given
S- > Ed
Given
Show: En v Ed
( M ^ A)- > En ^ S- > Ed
2,3 Conj
En v Ed
1,4 CD
S- Substitutes
Ed – Education Math Major student En – Engineering Student