Which of the following are production activities that are included in GDP? Which are not?

a) Mr. King performs the service of painting his own house instead of paying someone else to do it.
This activity is _____ in the GDP.

b) Mr. King paints houses for a living.
This activity is _____ in the GDP.

c) Mrs. King earns income from parents by taking baby photos in her home photography studio.
This activity is _____ in the GDP.

d) Mrs. King takes photos of planets and stars as part of her astronomy hobby.
This activity is _____ in the GDP.