С первое это пример! 1) number 4 is sunday.what day is 1? - thursday 2)number 5 is friday.what day is 3? - 3)number 2 is wednesday.what day is 5? - 4)number 7 is saturday.what day is 1? - 5)number 1 is tuesday.what day is 7? - 6)number 5 is thursday.what day is 3? - 7)number 7 is monday.what day is 4? - нужна !