What is the meaning of the word lean in this sentence?
with no relatives living nearby, and no one else to depend on, robert had to leg
on his friends during emergencies.
1 to rely on something or someone
2 without much flesh or fat
3 a noticeable bend in one direction
4 to tilt in a certain direction

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?