The diagram below shows a lever in use. Name the class of lever in use.

The diagram below shows a lever in use. Calculate its mechanical advantage. (Write the answer up to two decimal points)

The diagram below shows a lever in use. $k \mathrm{kgf}$ effort is used to overcome this load. The value of k is _____.

The figure below shows a mango cutter in use. Mark the positions of load, effort and fulcrum in figure. Name the type of lever.