3. The current US dollar rate is $1=Tk.85 and it is expected to move either to Tk.84 or Tk.86 in 3 months' time. Find out the reason and nature of operation of a speculator having operations in both USA and Bangladesh with a fund of $10 million or equivalent assuming US lending and borrowing rates are 2% and 3%, respectively, and Bangladesh lending and borrowing rates are 7% and 12%, respectively. (b) How can you derive the equilibrium foreign exchange rate from commodity market