In each case, indicate whether the example (a) affects the demand for or supply of British pounds on international markets; (b) shifts demand/supply to the right or the left; (c) causes the pound to...

In each case, indicate whether the example (a) affects the demand for or supply of British pounds on international markets; (b) shifts demand/supply to the right or the left; (c) causes the pound to appreciate or depreciate.

(a) Due to Brexit, European firms sharply cut purchases of British goods.

(b) Foreign banks increase purchases of shares in British corporations.

(c ) With COVID-19 cases rising, British residents cancel foreign travel plans.