SPECIFY THE ANSWERS

You are using a CAT backhoe for foundation excavation. The rated heap capacity of the bucket is $1\mathrm{.}5$ CY$.$ The type of soil is sand. The soil consists of less than $25\%$ of rock content. Depth of excavation is $50\%$ of the machine's maximum digging depth and the swing angle is less than $60$ degrees. The operational efficiency of the backhoe is $50mi\frac{n}{h}r.$ The excavated materials are loaded into dump trucks with heaped capacity of $20$ LCY$.$ The cycle time of a truck is $14$ minutes.

$($a$)$ Estimate the hourly production of the excavator.

$($b$)$ How many trucks do you need?

$($c$)$ Using the number of trucks obtained in part $($b$),$ how would the hourly production of the operation change if the cycle time of the trucks changes to $22$ minutes due to traffic on the haul road $($no calculations required for this part$-$ just explain how would the change impact the production$)$

SPECIFY: Which answer is for what question