A cryptography student has accidentally used the same keystream to encrypt two different messages, 1 and 2. We know that the ciphertexts are 1=08821292 and 2=0212873888. We also happen to know that 1=0878223637.

a) What is 2 in hexadecimal? Please give your answer a leading 0x and use lowercase letters only.

b) What is the keystream? Please give your answer a leading 0x and use lowercase letters only. Hint: These are all 8 byte numbers and will fit in an unsigned long type on most systems.