If the block is at rest (and the only forces acting on the block are the force due to gravity and the normal force from the table), what is the magnitude of the force due to friction? View Available Hint(s)for Part A Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type Ffriction = nothing Part B Suppose you want to move the block, but you want to push it with the least horizontal force possible to get it moving. With what horizontal force F must you be pushing the block just before the block begins to move? Express the magnitude of F in terms of some or all the variables s , k , and m , as well as the free-fall acceleration g . View Available Hint(s)for Part B Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type F = nothing Part C Suppose you push horizontally with half the force needed to just make the block move. What is the magnitude of the friction force? Express your answer in terms of some or all of the variables s , k , and