Assume the government wants to increase GDP and income Y

It has $100 million to use.
Explain why spending it on

Question

Assume the government wants to increase GDP and income Y. It has $100 million to use. Explain why spending it on

roads and bridges (government spending G) will increase Y more or less than if it used the money on transfer payments (R) such as welfare payments. You must refer to the muiplier and mathematically why one policy would be different from the other. Explain why one policy would work better than the other.

Economics