Please further expand the function you implemented in $(2)$ to allow the printing of the number

of each unique $$leaf part$$ in a sub$-$parts$-$structure tree as the example shown below in JAVA

In this example, given the part $$P$1$ and its sub$-$parts$-$structure tree, there are $2*9*3+4*3*9*3=$

$378$P$6$ parts and $4*1*8=32$P$7$ parts. Therefore, given input value $$P$1,$ the function should

print out the following $($you need to create a table with the data above to test your code$)$:

P$6378$

P$732$