A list of items follows:

$1.$ Tools that are very expensive.

$2.$ Incomplete support of the functional architecture.

$3.$ Highly sophisticated tools that require years of training to use.

$4.$ Tools that have not been implemented to their best advantage.

$5.$ Tools that are easy to hack.

$6.$ Tools that create more problems than they solve.

$7.$ Tools and technologies that have no vendor support.

$8.$ Tools that require the company to hire expensive IT staff.

Which one of the following combinations of items contains the HIGHEST NUMBER of typical areas of concern that the IT executive was wondering about?