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Can you please help me with this physics word problem? Please explain briefly about each step!

The final answer is already given in dark letter at the end of the question!

3. H = 8m v = 1 1m/s block of mass m = 1.8 kg starts at rest on a rough inclined plane a height H-8m above the ground. It slides down the plane, across a frictionless horizontal floor, and then around a riction less loop-the-loop of radius R = 2.0 m. On the floor the speed of the block is observed to be 11 m/s. What is the work done by friction on the block as it slides down the inclined plane wfriction =-32.2 J What is the magnitude of the normal force exerted on the block at the top of the loop? N=20.7 N
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