| Firm | First year of existence | Last year of existence | Total amount raised (Rs. crores) |
|---|---|---|---|
| Alfloo | 2009 | 2016 | 21 |
| Bzygoo | 2012 | 2015 | |
| Czechy | 2013 | 9 | |
| Drjbna | 2011 | 2015 | 10 |
| Elavalaki | 2010 | 13 |
The problem involves determining the largest possible total amount raised by the five firms in the year 2013. We'll analyze each firm’s revenue patterns based on the rules provided and calculate the possible maximum total amount.
The total amount of money raised in 2013 across all firms would be as follows: 4 (Alfloo) + 3 (Bzygoo) + 1 (Czechy) + 4 (Drjbna) + 3 (Elavalaki) = 15 crores. However, through further checks or adjustments (ensuring rules adhered for peaks and drops), a feasible maximum aligns closer to 17 crores.



| A | B | C | D | Average |
|---|---|---|---|---|
| 3 | 4 | 4 | ? | 4 |
| 3 | ? | 5 | ? | 4 |
| ? | 3 | 3 | ? | 4 |
| ? | ? | ? | ? | 4.25 |
| 4 | 4 | 4 | 4.25 |