All the four children of Mr . Madan Mohan Lal are doctors . Shyam is a skin specialist . Krishna is a heart specialist , Radhika is a chil specialist and Gauri is a physician . Dr . Shyam joined a multispeciality private hospital . Dr Krishna established his own nursing home . Dr . Radhika works in a government hospital adn also treats the poor people free of cost in a charitable dispensary . Dr . Gauri opened a medical store wherein she sells genuine medicines , getting the minimum profit margin.
(a) State , giving reasons , wherein they are engaged in economic or non - economic activities .
(b) Also explain in which form of the economic activities and non - economic activities they have been engaged.