What has happened to the exchange-rate value of the dollar in each case?
a. The spot rate goes from $1.25/SFr to $1.30/SFr.
b. The spot rate goes from SFr 0.80/$ to SFr 0.77/$.
c. The spot rate goes from $0.010/yen to $0.009/yen.
d. The spot rate goes from 100 yen/$ to 111 yen/$.