$5.$ Use the Playfair cipher with keyword FINALS WEEK to encrypt the message COLLEGE.

$($a$)$ DMFFGPGN

$($b$)$ DMNZNBPG

$($c$)$ GHBTMOPXZW

$($d$)$ DMQRLJYUWV

$6.$ You have $$5000$ that you invest at $5\%$ simple interest. What is the accumulated value of this account

after $6$ years?

$($a$)$ $$6500$

$($b$)$ $$5750$

$($c$)$ $$1500$

$($d$)$ $$5500$