There are a a total of 64 numbered rows of seating in Section K, so at Row 49 you will be near the back of the section, and 20 rows up from the section entry tunnel located just above Row 29.

In the upper portion above the entry tunnel, the aisle runs up and down the middle of the section, with Seats 1-13 located on the right side of the section (as you face the field), and Seats 14-30 located on the left side. Thus, seats 18 and 19 will be just 5 seats off of the middle aisle after walking up to Row 49 from the entry tunnel.