Hello, I'm having trouble figuring this out can you help me?

A firm expects to pay a dividend of $1.75 per share at the end of the year (D₁= $1.75) and its common stock now sells for $45 per share.The firm's dividend growth rate is 7% every year.The firm plans to issue the new common stock and the pecentage flotation cost required to sell the new common stock is 10%.What is the firm's cost of new common stock, k_e?