Question $4$: rdt$3\mathrm{.}0$ protocol

Consider the given time diagram below, which shows unidirectional transfer of data from sender to receiver using rdt$3\mathrm{.}0$ protocol. The packet corruptions or ack corruption is indicated with a dashed line $($as it is done in the lectures$).$ The packet or ack loss is indicated with red $\backslash ($ x $\backslash ).$ Specify the values of $\backslash ($ A $\backslash )$ to K $...$