The table below shows an economy's production possibilities for producing either pizza or beer.

Pizza	Beer
100	0
99	14
95	28
89	41
81	53
71	64
59	73
45	80
31	86
16	89
0	90

b) If the economy is currently producing 28 Beer and 80 Pizza, is this an efficient combination of the production of Pizza and Beer? Why/why not?