Question 1. The central rates for the Spanish and Belgian currencies on March 20, 1997, were Ptas 163.826/ECU and BF 39.7191/ECU. (3 points) a) What central cross rates between these two currencies did these central rates imply? b) Under the original 2.25% margin on either side of the central rate, what were the approximate upper and lower intervention limits for Spain and Belgium? c) Under the revised 15% margin on either side of the central rate, what are the current approximate upper and lower intervention limits for Spain and Belgium