What will be the firms growth rate? what will happen to the value of its common stock?

please help me to understand this problem

(Measuring growth) Given that a firm's roturn on equay is 19 percent and managecrent plans to retain 44 percent of eamings for invattrient purposes, ahat will be the frims growth rabe? If the frm decides to increase its retention rale, what will happen to the value of ts comnon slock? a. The firmis growh rate will be 4. (Round to two docimal places.)