Please consider the logical equivalence $>,$ representing the if and only if statement $($sometimes

referred to as iff. $($Please look up the truth table for it; you may also recall the XNOR gate from your

digital circuits classes$).$

Now, examine the following statement:

A pilot who is certified can fly commercial aviation if they are less than $65$ years old, but otherwise

cannot fly commercial.

Which of the following are correct representations of the above assertion? Please answer YES OR

NO$,$ and justify your answer.

C$-$ certified

F $-$ fly

LT$65-$ less than $65$

$$ is a symbol for NOT

a$.(C^F)>LT65$

b$.$ LT$65)$

c$.C=>((LT65=>F)vF)$