Rose receives 1 milligrams (mg) of a therapeutic drug on her first day in a hospital. The amount of the drug rose receives increases by the same amount, d, each day. On the seventh day, she receives 20 mg of the drug, and on the eleventh day she receives 26 mg. (a) Write down an equation, in terms of 1and d, for the amount of the drug that she receives (i) On the seventh day. (ii) On the eleventh day.