Seven colour illustrations of animal characters for a children's book

Looking for seven illustrations for a children's book. The animals should be in bold cheerful colours with simple lines. The background can be mostly white.

Picture of male lion sitting face forward i.e. towards the viewer
Picture of wildebeest standing side on left to right, with face turned forward towards the viewer
Picture of male lion stalking through grass from left to right
Picture of wildebeest chasing male lion from left to right
Picture of male lion and wildebeest lying down facing each other . Lion on the right and wildebeest on the left. With a waterfall behind the lion
Picture of herd of zebra lying down from left to right
Picture of lots of animals – zebra, giraffe, wildebeest, rhino, elephants – lying down (left to right), facing male lion also lying down (right to left), with a waterfall the lion and two small helicopters circling overhead and two more in the distance.

Please state what medium the illustrations will be delivered in i.e. png