Discuss and explain the impact of each transaction below on the calculation of the gross domestic product in the current year in no more than three sentences.

1. A government agency buys new laptops from a local supplier in the current year.
2. The local supplier in letter A buys the laptops from abroad a year ago.
3. Government hospitals employ medical and healthcare workers in the current year.
4. Traders buy rice from Vietnam a year ago.
5. The medical and healthcare workers in letter c buy rice from the traders in the current year.