In class exercise - Drawing Trees with Graphviz

In this exercise we will draw trees using the Graphviz tool "dot".

To get started do the following

module UsingDot where

import Graphviz

data MyTree a = ...

tree1:: MyTree ?
tree1 = ...

tree2:: MyTree ?
tree2 = ...

tree3:: MyTree ?
tree3 = ...

main = toPng tree1

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