$3.(2$ pts$)$ The channel below has a flow rate of $1\mathrm{.}0$ m$3/$s and is rectangular in shape

throughout. As it approaches the transition, the flow depth in the channel is

$0\mathrm{.}2$ m$.$ Evaluate the channel transition for choking and determine the flow

depth at A and B$.$ Neglect the head loss through the transition.

Note: the flow depth at A is the flow depth due to choking, if applicable.