This question is about finding the function body for a function called enhance based on the input$/$output behavior of the function enhance. Consider the following LAMBDA call and its output:

$=$LAMBDA$($a$,$b$,$c$,$d$,$

VSTACK$($

HSTACK$($

enhance$($a$,$ "Default A$"),$

enhance$($IFERROR$($XLOOKUP$($b$,\{"$Nonexistent$"\},\{"$No Match"$\},"$No Match"$),$ "Default B$"),$ "Default B$"),$

enhance$($FILTER$($d$,$ d $<0),$ "Default C$")$

$),$

HSTACK$("$Default A$",$ "Default B$",$ "General Default"$)$

$)$

$)(2,$ "Orange", $\{"$Apple$",$"Banana","Orange"$\},\{1,2,3\})$

Output:

$2$ No Match Default C

Default A Default B General Default

This output shows you the result of the LAMBDA call, which includes the results of $3$ enhance calls. Based on the input$/$output behavior of the enhance function, find its body.

The function enhance uses the signature LAMBDA$($x$,$y$,$BODY$),$ where x and y are the formal arguments. BODY must be the most straightforward and shortest enhance implementation consistent with the given input$/$output behavior. Don't use any blanks in BODY. There is only one correct answer for BODY. Test your solution with Excel $365$ by defining function enhance in the name manager.

To answer this question successfully, you need to know: $(1)$ How LAMBDA works with formal and actual arguments, $(2)$ The syntax and meaning of a LAMBDA, $(3)$ The functions appearing inside LAMBDA$($i$.$e$.,$ HSTACK, SEQUENCE, XLOOKUP, FILTER$),(4)$ How to name and define a function in the name manager.