Telecom operators are asking for Ericsson to take responsibility for performance KPI levels. The operator's solutions will be deployed according to Ericsson's reference configuration and all parts of the solution are designed to achieve a five $9$s service availability.$$

$$

What are three requirements for Ericsson to accomplish these goals? $($Choose three.$)$

$1-$ The software is updated according to the Ericsson Lifecycle Plan.

$2-$ Ericsson has design control of all aspects of the solution

$3-$ The operator designs the solution; Ericsson provides the required software.

$4-$ Managed Services must be performed by Ericsson for the entire solution, including the infrastructure.

$5-$ Ericsson must deliver all hardware and software.