An engineer joins a company on 1st April 2024 with an annual salary of Rs.\;3,60,000. Her salary is to be increased by Rs.\;25,000 at the start of every subsequent financial year.
(i) Taking the starting salary as the first term, write an expression for her salary in the nth financial year.
(ii) In which financial year will her salary first reach at least Rs.\;5,60,000? Give full working.
(iii) What will be her exact salary in the year found in part (ii)?
(iv) For how many complete financial years will her salary remain below Rs.\;5,60,000?