Part A: Consider a variant of CBC$-$mode encryption where the sender simply bitshifts the IV one place to left with wrap around $($i$.$e$.011011$ becomes $110110)$ each time a message is encrypted $($rather than choosing IV at random each time$).$ Show that the resulting scheme is not CPA$-$secure$.$

Part B: What is the effect of flipping all the bits of a block in the ciphertext when using the CBC$,$ ECB, and CTR modes of operation?