On July 1, Kevin Swisher purchased 6,000 shares of preferred for $25.12 per share. The stock is to pay a dividend of $.29(1.02)^k-1 at the end of each quarter of k-th year Kevin holds the stock. That is to say, he first recieves for successive end-of-quarter payments at a rate .29(1.02) per share, etc. Find the yield rate for this purchase assuming all dividends are paid and Kevin holds the stock forever.

Please show work. Not just spread sheet

I think my struggle is I know have to use the idea of a geometric series to solve but the fact the I have four of each payment is confusing me as to how to apply this.

On July 1, Kevin Swisher purchases 6,000 shares of preferred stock for $25.13 On July 1, Kevin Swisher purchases 6,000 shares of preferred stock for $25,13 per share. The stock is to pay a dividend of $.29(1.02)*- at the end of each quarter of the k-th year Kevin holds the stock. That is to say, he first receives four successive end-of-quarter payments at a rate of $.29 per share, then four successive end-of-quarter payments at a rate of $.29(1.02) per share, etc. Find the yield rate for this purchase assuming all dividends are paid and Kevin holds the stock forever