$($a$)$ A multimedia application allows users to create and edit their own songs and videos. The customer manages the network in in$-$house facilities.

$($b$)$ Google offers a Git service, providing collaboration tools for software projects. Customers build applications using the service.

$\backslash$table$[[\backslash$table$[[$Which layers are managed$],[$by the customer?$]],[,$web browser$],[,$application$],[,$utilities and tools$],[,$database$],[[,$operating system$],[4,$virtual machine$],[4,$server$],[$L$,$network$],[,$storage media$]]$

What is the

Pick

Pick

$1$