I would like help with solving a supernormal calculation/valuation and dividend growth rates.

Company X is expanding rapidly, and it currently needs to retain all of its earnings, hence it does not pay any dividends. However, investors expect Company X to begin paying dividends, with the first dividend D₂coming 2 years from today. The dividend should grow rapidly--at a rate of g_3,4 per year--during years 3 and 4. After year 4, the company should grow at a constant rate of g per year. If the required return on the stock is r_s, what is the value of the stock today (P₀)?

Input Data	D2 $1.81	g3,4 25%	g 3.50%
		rs 14%
P0	=?