issuing stock or debt

Hello. I have that thing here to solve which I am having trouble with:

The firm needs 1 M for an investment
Current share number : 1M price 16
wacc the smallest when debt rario is 1.4
so what will happen to stock price 1) when issuing new debt to raise the money 2) and when issuing debt
(consider pecking order theory)

I am so confused about using the numbers – like what am i supposed to do with them specially with the target ratio and and the amount needed. I mean we know that the stock price will fall when issuing new equity but i am confused about issuing new debt.