$[$Marks: $2\mathrm{.}5+2\mathrm{.}5+2\mathrm{.}5+2\mathrm{.}5]$

Find following for the above tree.

$(1)$ In$-$order Traversal

$(2)$ Pre$-$order Traversal

$(3)$ Post$-$order Traversal

$(4)$ Diameter path of tree