Consider an electrician who is about to drill holes though a series of 2-inch by 10-inch by 16-foot floor joists that are supported only at their ends by walls. Which of the following hole locations would DECREASE the load strength of each joist the LEAST:

W)7 feet in from one of the supporting walls near the bottom edge

X)7 feet from one of the supporting walls near the top edge

Y)1 foot from one of the supporting walls near the bottom edge

Z)1 foot from one of the supporting walls half way down from the top edge
Z)1 FOOT FROM ONE OF THE SUPPORTING WALLS HALF WAY DOWN FROM THE TOP EDGE