Individual tax audit query

Hi

My income has 2 components

1) Salary - (say 10 Lacs)

2) Income from professional services (say 9 Lacs)

My queries are

1) As per section 44AB of income tax audit, do i need audit?

2) Do we need to add whole income (SALARY+professional service income) for deciding the tax audit requirements or its just the professional/business income thats is to be taken into account? Somebody told me that i need audit.

3) In case audit is not required, would an audit be required when my professional services income exceeds 15 Lakhs.

Thanks in adavance for your valauable suggestions.

Thanks
Rishi