Помогите плиз из passive в active переделать

4) A lot of bands are playing rock at the moment. 5) The old lady told us that everything costs something. 6) The boy will be spending the day the same way. 7) The experts have defused the bomb. 8) When mother came in, the aunt had already informed the boy about that. 9) The government will have done this by next year. 10) My friend can successfully deviver that to you. 11) The stuff could do the work much earlier.