$(1$ point$)$ Consider the hex strings $A=08618d8da94dcb8dd$ and $B=0038524f2$adc$3847e.$

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

hexadecimal:

b$)$ Suppose that A was generated uniformly at random from all $8$ byte strings. What is the probability that the second binary digit of $A$ is $1?$

c$)$ Suppose that A was generated uniformly at random from all $8$ byte strings. What is the probability that the second binary digit of $Ao+B$ is $1?$