From the International Fisher Effect (IFE), we know that the formula to find the adjusted level for the British Pound should be:
Spot rate x (1- U.S. interest rate)/(1 - U.K. interest rate).
Plugging in the known values, we get: $1.50 / (1 - 0.05) / (1 - 0.07), which gives us: $1.47.