Q$3)(20$ marks$)$

a$)$ Compare effective parameters on productivity of a scraper and an excavator $(5$marks$)$

b$)$ The average production of the excavator is the controlling factor in a highway ditch cleaning contract. Excavator with four different size buckets are available as rental units. The excavator characteristics are as follow:

Note: LCM$=$ Loose Cubic Meter, $CCM=$ Compacted Cubic Meter

$\backslash$table$[[$Excavator$,\backslash$table$[[$Average$],[$Cycle Time$],[(min)$