Use the Diagram Below to Answer the Questions

Essay

Use the diagram below to answer the questions.
(a)If the economy's production possibilities curve is shown by curve AB,then draw in a new curve,which indicates positive economic growth.
(b)If the economy illustrated by production possibilities curve AB is producing at point 4,what economic problem does this represent for this economy?
(c)What are some of the factors,which could cause a shift from AB to EF?