What is the share purchase price of a Series B round given the following information? $$5$ million investment. $1,000,000$ shares exist in the company today. $$20$ million pre$-$money valuation. $$25$ million post$-$money valuation. Company revenue of $$5$ million and EBITDA of $$500,000.$

a$.$ $$10$

b$.$ $$15$

c$.$ $$20$

d$.$ $$25$