Drill holes in concrete wall + plaster small parts of wall

Several small jobs: - We need two 8mm wide and approx. 6cm deep clean holes in strong concrete wall. - We need to plaster two small areas (less than 1 square meter each) on a wall next to a window. The room is in use, so would need to cover up properly in order to contain dust. Possible to do just one of the jobs. The sooner the better.