Numbers 4 and 5 are posted below

6) Write a class, Sequence, with instance variable: private int sea and methods: private static int sollatz(int i); // The method from problem 4 private static int sollatz sequense(int i) I/ The method from problem 5 //A constructor that initializes sea to length 20, containing the first // 20 values of A006577 (hint: call collatz sequence)) public Sequence); // A constructor that initializes sea to length ?, containing the first // i values of A006577 (no more hints) public Sequence(int i); // Returns the ith value of A006577. If i is greater than the length of // sea, then before returning a value, allocate a new array of length (2 //i), copy the values in seq to the new array, calculate the // remaining values to fill the array, and assign sea the reference to / the new array. To get full credit, you may not recalculate the values // previously in seq thus you should not call collatz se). public int getAt(int i)