Answer@@@@
Initial deposit of Kate = $4,000
Price of one novel = $10
Purchasing power of $4,000 deposit = Deposit/Price of one novel = $4,000/$10 = 400 novels
Thus, the purchasing power of Kate's $4,000 deposit is 400 mystery novels.
CASE I - Inflation rate is 0%
Current price of novel - $10
Price of novel after one year = Current price of novel + (Current price of novel * Inflation rate)
= $10 + ($10 * 0) = $10
Current value of deposit = $4,000
Interest rate on deposit = 5% or 0.05
Value of deposit after one year = Current value of deposit + (Current value of deposit * interest rate)
= $4,000 + ($4,000 * 0.05) = $4,000 + $200 = $4,200
Calculate Number of novels purchased after one year -
Novels purchased = Value of deposit after one year/Price of novel after one year
= $4,200/10 = 420 novels
Calculate real interest rate -
Real interest rate = Nominal interest rate - Inflation = 5% - 0% = 5%
CASE II - Inflation rate is 5%
Current price of novel - $10
Price of novel after one year = Current price of novel + (Current price of novel * Inflation rate)
= $10 + ($10 * 0.05) = $10.50
Current value of deposit = $4,000
Interest rate on deposit = 5% or 0.05
Value of deposit after one year = Current value of deposit + (Current value of deposit * interest rate)
= $4,000 + ($4,000 * 0.05) = $4,000 + $200 = $4,200
Calculate Number of novels purchased after one year -
Novels purchased = Value of deposit after one year/Price of novel after one year
= $4,200/10.50 = 400 novels
Calculate real interest rate -
Real interest rate = Nominal interest rate - Inflation = 5% - 5% = 0%
CASE III - Inflation rate is 8%
Current price of novel - $10
Price of novel after one year = Current price of novel + (Current price of novel * Inflation rate)
= $10 + ($10 * 0.08) = $10.80
Current value of deposit = $4,000
Interest rate on deposit = 5% or 0.05
Value of deposit after one year = Current value of deposit + (Current value of deposit * interest rate)
= $4,000 + ($4,000 * 0.05) = $4,000 + $200 = $4,200
Calculate Number of novels purchased after one year -
Novels purchased = Value of deposit after one year/Price of novel after one year
= $4,200/10.80 = 388 novels
Calculate real interest rate -
Real interest rate = Nominal interest rate - Inflation = 5% - 8% = -3%
Following is the required graph -
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