The spot rate for the Omani Rial is $$\frac{2\mathrm{.}5986}{?}$ Rial. The U$.$S$.$ inflation rate is anticipated to be $6\mathrm{.}8\%.$ The Oman inflation rate is expected to be $9\mathrm{.}8\%.$ Both countries are expected to have a real interest rate of $1\mathrm{.}3\%.$ Show calculations.

a$.$ Based on the Fisher effect, calculate the U$.$S$.$ nominal interest rate $(x.xx\%).$

b$.$ Based on the Fisher effect, calculate the Omani nominal interest rate $(x.xx\%.$

c$.$ Using purchasing power parity, calculate the expected spot rate in I year.

d$.$ Using purchasing power parity, calculate the expected spot rate in $3$ years.

e$.$ Using the inicmational Fisher effect, calculate the expected spot rate in $2$ years.