Please help me to solve this accounting question about journal entries

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Please help me to solve this accounting question about journal entries

Ahmed was accounting manager at ABC co and he is a cousin of Adel, the CEO of ABC co. The CEO stood to earn a substantial bonus if ABC increased net income by year-end. Ahmed, the accounting manager, boasted to Adel, the CEO, that he knew some accounting tricks that could increase company income by revising a few journal entries for rental payments on production units. 

At the end of the year, Ahmed changed the debits from ‘rent expenses’ to ‘prepaid rent’ on several entries. As a result, Adel got his bonus and the deviations were never discovered.

Requirements:

1- How did the change in the journal entries affect the net income of the company at year-end?