please help me with this. thank you!

2. Calculate the net income or net loss for each of the following then, identify the accounting period. (a) Revenue for the year: $500 000 Expenses for the year: 375 000 (b) Revenue for September: $90 000 Expenses for September: 86 000 (C) Revenue for 6 months: $329 000 Expenses for 6 months: 362 000 (d) Revenue for January 1-March 31: $290 000 Expenses for January 1-March 31: 230 000 (e) Revenue for October: $68 350 Expenses for October: 79 800