Please select all True statements about Statistical Process Control:

Used to find the proportion of individual outputs $($products$)$ that would be accepted by the customer $($dessigner$)-$ fall within specifications.

Samples statistics $($e$.$g$.,$ average, percentage$)\text{'}$are compared to control$-$limits$.$

Specifications are determined externally by the customer $($designer$).$

Uses Control$-$Limits which are calculated using process properties $-$ e$.$g$.,$ mean and STD$.$

Applied to verify a process is stable $-$ in$-$control.

Calculated using customer $($designer$)$ specification and the process STD$.$