Identify all the prepositions in the provided sentences.

Here are the prepositions in each sentence:

a) The rhino poachers killed another rhino in the Kruger Park on Saturday and cut the horn off its head.

b) They quite often drive into the park before sunrise.

c) Police helicopters flew over the area to try to spot the poachers.

d) The police stop them along the road and search through the bakkie, but sometimes the poachers hide the horns under the bakkie.