Read the statements below carefully, and decide whether it is true or false. And then explain your answer (whether "true " or "false").
a.) If interest rates increase, then investment expenditures by firms will tend to increase also.
b.) If an economy is experiencing cost-push inflation, then its real GDP will tend to be rising in the short run. Describe in words the shift that would happen in the SRAS-AD graphs, to support your answer.