Assume we want to insert an element into an array at a certain index such that none of the existing elements in the array are overwritten, and the order of existing elements is not changed.

For example, given an array containing values $7,8,1,2,$ after inserting a $9$ into index $1$ the contents would be $7,9,8,1,2.$

To complete this process, which of the following statements must be true. Select all that apply.

Question options:

the number of elements in the array before the new element is inserted must be less than $(<)$ the length of the array to ensure there is room for the new element

the specified index to insert the new element must be less than or equal to $(<=)$ the length of the array

the number of elements in the array before the new element is inserted must be less than $(<)$ the length of the array$-1($ie$.<$ array.length$-1)$ to ensure there is room for the new element

elements from the specified index onward must be moved over to the right by one index before the value can be inserted.

the specified index to insert the new element must not be negative

the specified index to insert the new element must be less than $(<)$ the length of the array

the number of elements in the array before the new element is inserted must be less than or equal to $(<=)$ the length of the array to ensure there is room for the new element