Fill in the blanks in the given flow chart:

(N/A) The process described is somatic hybridization,which involves the fusion of protoplasts from two different plant species.
$(1)$ Cellulase and pectinase are enzymes used to digest the cell wall to isolate protoplasts.
$(2)$ The process of fusing these protoplasts is called Somatic hybridization.
$(3)$ The resulting plant obtained from the fusion of tomato and potato protoplasts is known as Pomato.
$(4)$ The term used to denote such plants is Somatic hybrid.