Peterson Manufacturing recently reported EBITDA of $$18\mathrm{.}75$ million and $$4\mathrm{.}5$ million of net income. It has $$5$ million of interest expense and its corporate tax rate is $40\%.$ What was its depreciation and amortization expense $($in millions of dollars$)?$

a$.$ $$6\mathrm{.}25$

b$.$ $$3\mathrm{.}75$

c$.$ $$1\mathrm{.}50$

d$.$ $$2\mathrm{.}25$

e$.$ $$8\mathrm{.}50$