Ex $1$: Define a class Farmer with the following specifications:

Attributes:

name $($private$)$: The farmer$$s name $($default to $$Unknown$).$

crop $($private$)$: The type of crop the farmer cultivates $($default to $$Wheat$).$

experience $($private$)$: The years of farming experience $($default to $0).$

Methods:

updateCrop$($newCrop$)$: Updates the farmer$$s crop type.

increaseExperience$($years$)$: Adds the specified years to the farmer$$s experience.

displayRank$()$: Displays the farmer$$s rank based on experience:

Sprout $($if less than $5$ years experience$)$

Pro Farmer $($if less than $10$ years experience$)$

Cultivator $($otherwise$)$

Constructor:

Takes optional parameters for name, crop, and experience. If not provided, set default values as mentioned above.