The bar chart shows the revenue (in lakhs) of a company from three products-X, Y, and Z-over four years (2010 - 2013). In which year is the total revenue highest? 
| Year | Product X | Product Y | Product Z | Total Revenue |
|---|---|---|---|---|
| 2010 | 50 | 40 | 30 | 120 |
| 2011 | 60 | 50 | 40 | 150 |
| 2012 | 70 | 60 | 50 | 180 |
| 2013 | 80 | 55 | 45 | 180 |

In a sequence of numbers, each term is generated by multiplying the previous term by 2 and then subtracting 1. If the first term is 3, what is the fourth term in the sequence?
A pie chart shows the distribution of students across 5 faculties in a university. If 20% are in Arts, 25% in Science, 15% in Law, 30% in Engineering, and the rest in Commerce, what is the angle (in degrees) for Commerce?
For any natural number $k$, let $a_k = 3^k$. The smallest natural number $m$ for which \[ (a_1)^1 \times (a_2)^2 \times \dots \times (a_{20})^{20} \;<\; a_{21} \times a_{22} \times \dots \times a_{20+m} \] is: