Consider the three processes described below, which are being evaluated as possible choices to handle production of units for the firm DEF Associates.

$($Process D$,$ Fixed cost $1500,$ Variable costs per unit $1$$$),$

$($process E$,$ Fixed cost $850,$ variable costs per unit $5$$$)$

$($Process F$,$ Fixed cost $1200,$ variable costs per unit $3$$$)$

$($a$)$ Construct a crossover chart to show the comparative total costs of each process, as a function of the volume x of units producedYour graph should be neat, complete, reasonably scaled, and clearly labeled with all relevant information.

$($b$)$ In words, give a summary of which process is best $($lowest cost$)$ for which volumes.