CSC326/Spr 2019-E Name:. 4. Trace the client code on the next page and show output. (Refer to the so) @file PlainBox.h #ifndef-PLAIN-BOX define-PLAIN-BOX typedef double ItemType, class PlainBox private ItemType item; public Default constructor PlainBox () W Parameterized constructor PlainBox (const ItemType & theltem) II Method to change the value of the data field void setitem (const Item Type & theltem) II Method to return the value of the data field ItemType getitem () const PlainBox:PlainBox () item 0 PlainBox: PlainBox (const ItemType & theltem) item theltem void PlainBox:setiltem (const ItemType & theltem) item theltem ItemType PlainBox: getltem() const return item, llremainder of implementation NOT shown #endif 11 GO To Next Page