Here is exercise #3. [1.] Decode the following phrase, which was encoded using a affine encoding cipher on a 27-letter alphabet (the letters a-z and a blank). Note that a=0. xgb dkjvmbkffcmtkrv m lkaerask mdbmwkfmezremzkmxrcm kkmfvkrx mxgvkmaskrvsc ----------------------------------------------------------------------------- [2.] The message below has been encoded using a linear cipher, A*v, where A is a 3x3 matrix. The mesage was coded in a 97-character alphabet (given below), where the first character (a blank) is given the numeric code 0. You are given the decoding of the first sentence. Line breaks have been preserved. Decrypt the message. Alphabet:=convert([seq(i,i=32..126),162,164],bytes); First line of message: Found on the wall of a New York subway station: "I have just found a proof Coded message follows: ?}@v/]¤./Q$p<¤h ?%~DQU|f%eC.(¤xj9J=n Nii1N0p}e}/h%v@,C"wu-M{ky_L`.0Eh ? h ?%6; s%N`*Fu;h6$SnJ%eK¤}07nK]¤.x4c_3#FXI#%S(ds1n: al`¤!~c^*'iwI[Z/?g_L`RM#H{|JI@`M!+-h>A~SXUC&,J;'s,AL wT/!De8 uPT>yz11(0GmFw<%4al_=w¤'cmJaw8^E>tm¤5¤&vB(` L6hM!¤%z.^,_{/¢fK6i&g1o"! <'Q+kN k8@¤$`Z}CSb_@Y>yz/21gn^M|YT|He@kl_=Qw:Bi? P 9<[gn^"{/@v/]¤.#%S\5 kp+ $zSK*WuQ(Dg-_d"=o@}$.b$C#3G$zSRc>Ck8ZgnOO}1|]GRU]i)]/¢ES1f]R0GmXU!0j#wd6'yn P6v#U@!"f~H!azL$ZAL8V$zSM<|+svA*^.<)\6>w}jgn^M|YRfDvd/C&,]S|t`pVOi:2q]¤. f]RmSfDQ]^@V2