1. After the invention of a new high-speed computer chip, many firms decide to upgrade their computer systems.

2. A wave of credit-card fraud increases the frequency with which people make transactions in cash.

3. A best-seller personal finance book convinces the public to increase the percentage of their income devoted to saving.

for these shocks how can i use the keynesian cross graphs s to predict the effects of the shock on income, the interest rate, consumption, and investment