please solve the question in detail and please using graph paper

Carp liver containing 25.7% oil by mass will be extracted with pure ethyl ether to recover 95% of the feed oil amount in a countercurrent multistage solid-liquid extraction system. The feed is at a flow rate of 1000kg/h and the extract phase outlet contains 70% oil by weight. In the experiments, the change in the slurry stream (N;xA) was found and given in the table. According to this, a) Calculate the flow rates and compositions of streams leaving the process (10p) b) Find the theoretical number of stages required for the desired separation (10p)