J$2$ Drop Bears

Drop bears live in nests in drop bear trees. Each nest has a number. The nest with the largest number is called home and its number is used to name the tree. For example, the following diagram shows drop bear tree $62.$

There are at most two downward branches from each nest to nests immediately below it$.$ Each branch is labelled L $($for left$)$ or R $($for right$),$ depending on its direction when looking at the tree. Every drop bear knows how to get to its nest from home by selecting the correct sequence of Ls and Rs$,$ called an LR$-$path. For example, the first $21$ nest from the left in tree $62$ has LR$-$path LLLR and the second $21$ nest has LR$-$path LLRL$.$

The nest numbers are called addresses. They consist of two positive integers a and $b$ written next to each other, with $a$ on the left. We insist that $b$ is a single digit, a has at most two digits, and $a>b.$ If a has two digits, then its first digit is not $0.$ For example, $62,503,$ and $758$ are valid addresses but $40,44,$ and $062$ are not.

Drop bears do special subtraction to work out the number of their nest. From any nest whose address has first integer a and second integer $b,$ to get the address of the nest below and to the left they subtract $1$ from $a,$ and to get the address of the nest below and to the right they subtract $1$ from both a and $b.$ For example, the left and right nests below $214$ are $204$ and $203$ respectively.

a Draw drop bear tree $148$ but only down to all the nests with addresses larger than $110.$

b In drop bear tree $148,$ what is the address of the nest at the end of the LR$-$path RLRLL$?$

c List the LR$-$path in drop bear tree $148$ to each nest with address $107.$

d How many nests with address $95$ are there in drop bear tree $148?$