I'm Having Trouble figuring out the present value of equity for this problem. Could someone help guide me?

Debt holders receive debt that pays them coupons of $2 million a year, and $30 million after 20 years (these are expected values as the coupons and principal payments are not riskless, the debt buyers realize the firms could default). They price the debt using a discount rate of 4 percent. Equity holders receive expected dividends of $3 million starting from year 5, and growing at a rate of 4 percent per year (a growing perpetuity). They price the equity using a discount rate of 7.5 percent.