Question $3$Using the Vigenere cypher with the encryption table shown in Figure $3\mathrm{.}1$ and the keycomputersecurity:A BC DE FG H IAAB C DBBCC c DD D EEE FF FGGHI HKKIIJJ KGMMHLLMNNOoPPPRR sSIs TTTX x YZ$2$QR SY Y $2$FKAMPWWX YVWBGHTMNPRVL MYABCF GHI JGHKLE FGH IRTYABH IJKI JK L$0$PoP oRK LMK L MNLMNOPW XY $2$VW X Y$2$AW X Y$2$ AzQRsQRsTRSTUSTUv WVWXY ZA BABJ KL M NO PORS T UV W X Y ZJKLM NOPQRSTUVW X YLM N OPQR S TQRs TQRsTR s TUSTUvwTUV WA BCMcDNCDDGMHNBR SSTWC DYEEGRJTWY$2$ADGJKPRSVXYABDGKPVW x YY$2$A BcDBCD ECDEFHY $2$K$2$ ABABCDEFG HE FGHFGHI JFigure $3\mathrm{.}1$IL MGL MNNPAH IJ K LJK LEFGMNVx Y $2$AB DERWABCHRVSX YABCDGHJMPx Y z ARSBCDECDEF GDEH$3$KGI J KPRLMMNoPSULOP$2$I JK LJKL MKL M NPC$($a$)$ Encrypt the message "Today is a good day." with an explanation of your method.$($b$)$ Decrypt the message "Icas fngb omvb kpx czoy." with an explanation of your method.H$($c$)$ Discuss how you would improve the Vigenere cypher to make sure it implements bothconfusion and diffusion in the cyphertext.JoPRT$[10\%][10\%][10\%]$MNoP