4. You have employed five workers of varying physical strength to dig a ditch. Workers without shovels have zero productivity in ditch digging. How should you assign shovels to workers if you do not have enough shovels to go around? How should you assign any additional shovels that you obtain? Using this example, discuss: LO 13.6 MEDIUM a)the relationship between the availability of physical capital and average labour productivity b)the concept of diminishing returns to capital.