Reminder: Hilbert proofs for Ex. 4.2Proof theory for epistemic logic. Give a Hilbert proof for CBKiC B, i.e., show that S5CCBKiCB, where S5C is defined by the axioms/rules displayed on top of the page and iB is some arbitrary agent identifier. You may write for S5C for brevity. Hint: You have to use the definition of EB:EB=iBKi..