video1.0<iframe src="https://www.loom.com/embed/536a0a4df9994c7ba2c19860da274b21" frameborder="0" width="1220" height="915" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>9151220Loomhttps://www.loom.com9151220https://cdn.loom.com/sessions/thumbnails/536a0a4df9994c7ba2c19860da274b21-00001.jpg341p: An architect wants to use the riser-tread formula to design a stairway with a total rise of 9 feet, a riser height between 7 and 8 inches, and an odd number of steps. With the architect's constraints, which of the following must be the tread depth, in inches, of the stairway? (1 foot = 12 inches)