Might seem quite simple, so don't judge lol
(a) Draw country A’s Production Possibilities Frontier (PPF) by using Excel (position food on the horizontal axle).
(b) What is happening to the opportunity cost of food in terms of clothing when the production of food is increasing?
(c) If the country is becoming better at the production of food, what will happen to the PPF curve? Add this new PPF curve to the one you produced in (a) by drawing it by hand.
(d) If the country gets equally better at producing both food and clothing. What will happen to the PPF curve?
I mainly need help with a, as I can probably do the rest on my own. The graph I made does not curve and I don't know what i'm doing wrong.