=1/Identify the sector to which each of the following types of company belongs: electricity producer, supermarket, temporary employment agency, specialised retailer, construction and public infrastructure.

Company 1 2 3 45 Sales 100 100 100 100 100 Production 100 100 104 99 0 Trading profit 23.0 24.8 0 0 0 Raw materials used 0 0 } 46.6 23.6 0 Other external charges 7.8 7.0 46.9 14.1 Personnel cost 9.3 11.7 21.5 24.1 88.2 EBITDA 6.8 6.7 28.1 3.7 4.6 Depreciation and amortisation 2.6 0.9 14.4 1.2 0.7 Operating income 4.2 5.8 7.1 2.9 3.1