$1\mathrm{.}1.$ Explain the purpose of using a swell factor in material volume calculations.$(2$ Marks$1\mathrm{.}2.$ Describe the advantages of using a Hydraulic excavator in mining operations.$(5$ Marks$)1\mathrm{.}3.$ Define the term boom reach and examine how it influences the overall production cycle of excavators in surface mining operations.NB: In your response, discuss the relationship between reach, cycle time, and productivity.$(7$ Marks$)1\mathrm{.}4.$ Demonstrate how to match a loader with a truck to improve efficiency in surface mining.$(2$ Marks$)$Subtotal $=$