If R is a ring, I is an ideal of R and is a subring of R. Define Show that the following is a subring of R (1 I containing . is an ideal of In S (2 (1 +S) I S (3 Ins If R is a ring, I is an ideal of R and is a subring of R. Define Show that the following is a subring of R (1 I containing . is an ideal of In S (2 (1 +S) I S (3 Ins