Alice and bob decide to use the prime

p= 601 for their affine cipher. the value of

p is public knowledge. eve intercepts the ciphertexts

c1= 324 and

c2= 381, and she also

manages to find the corresponding plaintexts are

m1= 387 and

m2= 491. determine

the private key and then use it to encrypt the message

m3= 173