Please utilize C++ to answer the questions1. Given that an array of int named a has been declared with 12 elements and that the integer variable k holds a value between 2 and 8.Assign 22 to the element just before a[k] .2.Given that an vector of int named a has been declared with 12 elements and that the integer variable k holds a value between 0 and 6.Assign 9 to the element just after a[k] .3. Given that an vector of int named a has been declared, and that the integer variable n contains the number of elements of the vector a , assign -1 to the last element in a .Please do not use a member function in your solution to this problem.
