Please fast answer

Dear student,
a. The activity in which Ajay is engaged is Business which refers to those economic activities which are connected with the production, purchase, sale or distribution of goods or services with the main objectives of earning profit.
Rani is engaged in Profession that refers to the activities which require special knowledge and skill to be applied by an individual in his work to earn a living. These activities are subject to guidelines or codes of conduct laid down by the professional bodies.
Sanjay is engaged in Employment that refers to an activity in which an individual works regularly for another person and gets remunerated in return. Those who are employed by others are known as employees. The person who engage others to work regularly for them are known as employers. The remuneration paid by employer to employee is known as salary or wage.
b. Difference between business, profession and employment

Basis of distinction	Business	Profession	Employment
1. Commencement	Business commence with the decision of entrepreneur.	Profession may commence on completion of a degree course and by getting a certificate of practice.	Employmentcommences on joining duty by entering into a service agreement.
2. Main objective	The main objective of business is to earn profit.	The main object of profession is to provide service.	The main objective of employment is to earn income in the form of salary by satisfying the employer.
3. Reward	Reward for business is called profit.	Reward for profession is called fees.	Reward for employment is called salary or wage.

Regards