Which of the following are true?

(a) BorderLayout is the default layout manager for a container.
(b) A JPanel cannot be added to another JPanel.
(c) In BorderLayout, two buttons added to the NORTH region will be placed side-by-side.
(d) When using BorderLayout for a component, the component has regions for a maximum of five other components.
(e) When using GridLayout with 2 rows and 3 columns, you must add 6 components.

Select all correct answers.