Im doing a distance learning course " Digital and Analog Devices and Circuits " .

Im stuck on the following question because I dont where from to start.

My confusion:

The counter outputs are 3 only, Q1 , Q2 , and Q3 but the logic outputs are 4 , A,B,C and D.

The truth table is not a Natural binary table.

So far I have not seen a 4 bit table with only 3 output of a flip-flop.

Could you please guide me to understand the question and help me to find the correct solution .