Complete the fact file below with the past simple passive form

Complete the fact file below with the past simple passive form of the verbs brackets.
1)It (not power) by electricity - it was mechanical.
2)The first electronic digital computer (build) in 1943 in Britain.
3)It (call) Colossus and it (use) for decoding enemy messages in the war.
4)Businesses began to use computers in the 1950s but computers (not sell) in shops until the earty 1970s.
5)The frist desktop computers (develop) in the late 1970s.
6)Internet access via a modem (add) in the 1990s, but wireiess access (not add) to most compiters until about 2000.