$3.$ There is a tax$-$cut that increases your Disposable Income by $$3,400,$ which you intend to save $$510.$

a$.$ Calculate the MPC$.$

b$.$ Interpret this MPC$.($What does it mean? Define MPC and describe in this context.$)$

c$.$ What is the resulting fiscal multiplier?

d$.$ Interpret the multiplier and describe the multiplier effect.

e$.$ Find the total change to the economy from this tax change.