answer question b in matlab

i know how to do part a but don't know part b

Application 3: Looping and Branching ENCR 1221 to doplay fral inswert to the command wingow. 1. Decoding a Message to decobe a mesage a) Cieste a Function to Decropt a Single Leter Write in ecternal vief-deficed function that bain two eputt. - An 12sal kipmatra Aed returns as as avtput - It nolener eaches, retuma blank upacer? At eample of tow the finctien should won is them below 2o decrypt_letter better_mat, any_nuts ahe - One approach to ths problem in as follow: - Loud the inown leter matricen toom Igplication 1 - Apply the xor opecision to decret the uratrown wain mutra compare the twe matices. if there is oo much, return a barat. One way to do thut is te make s 30 matris lae that Application 3: Looping and Branching ENCR 1221 Designed to test dewils with: boos, consilitional stetements wer-defined funffion method, but a miles the cose mare conpact. by Aoply the deurpe on function in a meriace Application 3: Looping and Branching ENCR 1221 to doplay fral inswert to the command wingow. 1. Decoding a Message to decobe a mesage a) Cieste a Function to Decropt a Single Leter Write in ecternal vief-deficed function that bain two eputt. - An 12sal kipmatra Aed returns as as avtput - It nolener eaches, retuma blank upacer? At eample of tow the finctien should won is them below 2o decrypt_letter better_mat, any_nuts ahe - One approach to ths problem in as follow: - Loud the inown leter matricen toom Igplication 1 - Apply the xor opecision to decret the uratrown wain mutra compare the twe matices. if there is oo much, return a barat. One way to do thut is te make s 30 matris lae that Application 3: Looping and Branching ENCR 1221 Designed to test dewils with: boos, consilitional stetements wer-defined funffion method, but a miles the cose mare conpact. by Aoply the deurpe on function in a meriace