Discuss the coefficient of static friction on the block

Question

Assignment:

The diagram shows a 0.74-kg square block at four positions along a track. The track is frictionless between points A and B. Elsewhere, the coefficient of static friction on the block is 0.36.

Initially, the block is held in place against a spring by a horizontal external force of magnitude 29 N. Then the external force is removed, and the block is projected forward with speed V₁= 1.2m/s . The block descends a ramp and has speed V₂= 1.9m/s at the bottom. At point C, its speed is V₃= 1.4m/s. The block ops at point D.

What is the height h of the ramp?

11 cm

1.5 m

82 cm

34 cm

2.6 m