Below a set of instructions is given on preparation of instant coffee. Using the instructions, fill in the blank in the sentence given below.
(i) Boil water.
(ii) Take one teaspoon each of instant coffee and sugar.
(iii) Add boiling water and stir the mixture vigorously.
(iv) Warm milk separately.
(v) Add warm milk to the mixture and stir.
(iv) Hot instant-coffee is ready to drink.