In the following cases, wich currency is appreciating and which one is depreciating :
(i) A change from `3$ =2=£ "to" 4 $ =2 £`
(ii) A change from `Rs.95 =2US $ "to" Rs. 150=3US$`
(iii) A change from `Rs. 140=2£ "to" Rs. 60 =1 £`
(iv) A change from `Rs. 52=1` Singapore `$ "to" Rs. 50=1` Singapore `$`