A shared resource matrix $($SRM$)$ is presented as$.$below. Specifically, rows are resources and columns are processes to access these resources. $"$R$"$ is to observe a resource and $"M"$ is to modify$/$set$/$create$/$delete a resource.

$\backslash$table$[[,$Process $1,$Process $2],[$Lock$,$R$,$R$,$ M$],[$X $($confidential data$),$R$,]]$

Please identify the true statement.

Process $1$ can leak the confidential data in $x$ to Process $2$ through a covert channel using the lock.

There is no covert channel between Process $1$ and Process $2$ since neither of them can read confidential data from $x.$

Process $2$ can leak the confidential data in $x$ to Process $1$ through a covert channel using the lock.

None of the above is true.