a$)$ The following pseudocode deletes node from an n$-$node Fibonacci heap. From thestructure given delete node $21.$ The auxiliary functions in this pseudocode are found onthe supplementary sheet.$(10$marks$]$FIB$-$HEAP$-$DELETE$($H$,$ x$)$FI$3-$HEAP$-$DECREASE$-$KEY$($H$,$ X$,-00)$FIB$-$HEAP$-$EXTRACT$-$MINH$)$H$.$min