a$.$ Explain what you understand by the term $$Prime Cost$.(3$ marks$)$

b$.$ Sketch a graph that depicts the following types of costs.

i$.$ Variable costs.

ii$.$ Fixed costs

iii. Stepped costs

iv$.$ Total cost $(4$ marks$)$

c$.$ Describe the following types of costs as used in cost accounting studies

a$.$ Conversion cost $(3$ marks$)$

b$.$ Opportunity cost $(4$ marks$)$

c$.$ Sunk cost $(3$ marks$)$

d$.$ Committed