please can someone help me for writing this program code in java language we have to use E7.20 and E7.21r respectively. thank you so much

question In text are as follow:

E7.20

consider the following class:

public class Sequence

{

private ArrayList values;

public Sequence() { values = new ArrayList(); }

public void add (int n) {values.add(n); }

public String toString() { return values. toString(); }

}

E7.21

add a method

public Sequence merge (Sequence other)

to the Sequence class as shown upper side E7.20 that merges two sequences, alternating elements from both sequences. if one sequence is shorter than the other, then alternate as Long as you can and then append the remaining elements from the longer sequence. for example, if a is

1 4 9 16

and b is. 9 7 4 9 11

then a.merge(b) returns the sequence

1 9 4 7 9 4 16 9 11

without modifying a or b