Find the Requested Partial Derivative $( \partial w / \partial y ) _ { x } \text { if } w = 4 x + 5 y + 6 z \text { and } x + y = z$

Multiple Choice

Find the requested partial derivative.
- $( \partial w / \partial y ) _ { x } \text { if } w = 4 x + 5 y + 6 z \text { and } x + y = z$

A) 1
B) 15
C) 11
D) 5