If two countries have production possibilities curves with different slopes, there is no possibility for gains from trade

Initially a firm pays a wage and gets an output per worker which are given index numbers of 1.00. Five possible 3 percent increases in the wage and the accompanying output per worker are as follows:

1.03 and 1.09, 1.06 and 1.17, 1.09 and 1.24, 1.13 and 1.29, 1.16 and 1.31. What is the efficiency wage? A) 1.03 B) 1.06 C) 1.09 D) 1.13 E) 1.16

When the policy rate decreases,

A) IS curve does not change. B) IS curve shifts to the right. C) IS curve shifts to the left. D) LM curve shifts upward. E) LM curve shifts downward.