Can somebody explain, how did he get that answers?

by step by step for me to understand easily

Thanks in advance.

\fb) (4 points) How much of each good does each consumer demand in equilibrium? Consumer A's Demand for X: |2. Consumer A's Demand for Y: 8 Consumer B's demand for X: Consumer B's demand for Y: D (2 points) What is the marginal rate of substitution for consumer A at the competitive equilibrium? Y= 1 MRS = - MVx Initial endowment 3xy My 3 y XWA = q WAY= 14 d) (10 points) Illustrate the situation in an Edgeworth Box. Be sure to label your box carefully and accurately. Identify the initial endowment and label it W.Identify the competitive equilibrium and label it D. Draw the budget constraint that each consumer faces and identify the values where it intercepts the perimeter of the Edgeworth Box (there are two different intercepts to identify). DA = 12 B Ma= 32 PX = 2 IF Mb = lb Py = 1 AAb 16 16 16 =15