Please explain and show me how to calculate for this question:

Strike price intervals for equity options are set at $2.50 intervals when the stock price is between $5 and $25, $5 intervals when the stock price is between $25 and $200, and $10 intervals when the stock price is over $200. Consider a stock that had an initial public offering price of $19, which then rose and closed at its highest level $26 at the end of the day. Which full set of strike price options are traded? $15, $20, $25, and $30 b. $17.50, $20, $22.50, $25, and $30 $17.50, $20, $22.50, $25, $27.50, and $30 d. $20, $22.50, $25, and $30 $20, $25, $30, and $35 a. c. e