Choose the clearest and most grammatically correct statement. 1-'Brush and feed the cats once a week and once a day, respectively. ' 2-'Brushing should be done every week, but feeding is every day. ' 3-'Brushing the cats once a week, also feed them once a day.' 4-'Brush the cats once a week and feed them once a day.' 5-'The cats should be brushed weekly and then fed daily. '