Physics questions; Average Speed, Acceleration and Final Speed?

Cassie starts from rest at the top of a 3.2m long playground slide and slides to the bottom with a constant acceleration. if she takes 2.4 seconds to reach the bottom, calculate a) her average speed b) her average acceleration c) her final speed d) her speed when she is halfway down the slide Please help... show more Cassie starts from rest at the top of a 3.2m long playground slide and slides to the bottom with a constant acceleration. if she takes 2.4 seconds to reach the bottom, calculate

a) her average speed
b) her average acceleration
c) her final speed
d) her speed when she is halfway down the slide

Please help meee :(
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