5типов вопросов к предложению: created in the 1920s by lionel de rothschild,exbury gardens are a visual extravaganza. )

Are Exbury Gardens a visual extravaganza?
Exbury Gardens are a visual extravaganza,aren't they?
When were Exbury Gardens created ?
Who created Exbury Gardens ?  или who were Exbury Gardens created by?
Are Exbury Gardens  a visual extravaganza or  typical(ordinary) gardens?