Answer:
a. Real output = 3200
b. The nominal output  = 6400
c. The real output increases with an increase in 20% money supply.
Explanation:
Money supply = $800
Velocity = 8
The price level = 2
The quantity theory is as follows:
Money supply × Velocity = Price level  × Real output
800  × 8 = 2  × Real ouput
Real output = 3200
b. the nominal output = Price level  × Real output
the nominal output = 2 × 3200 = 6400
c. the rise in money supply = 800 × 20% = 160
new money supply = 800 +160 = 960
Money supply × Velocity = Price level  × Real output
960  × 8 = 2  × Real ouput
Real output = 3840
The real output increases with an increase in 20% money supply.
Quantity theory of money = Money supply * Velocity of money = Price level * Real output
Nominal output = Price level * real output
a) Level of real output = Money supply* Velocity of money / Price level
Level of real output = $800*8 / 2
Level of real output = $6400 / 2
Level of real output = $3200
b) Nominal output = Price level * Real output
Nominal output = 2 * $3200
Nominal output = 6400
c) New money supply = $800+ %800*20/100
New money supply = $80 0+ $160
New money supply = $960
Nominal output = Money supply * Velocity of money
Nominal output = $960 * 8
Nominal output = $7680
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