2'3 19' Suppose w = + . where y z x 2 6575, y = 2 + 51.1105), and z = 2 + cos(4t). 1. Use the chain ruleto nd F1: as a function of as, y, z, and t. Do not rewrite 3:,y, and z in terms oi t, and do not rewrite 65' as :5. Note: Your answer should be an expression in as, y, z, and t; e.g. "3x - 4y + 2t\" dw 2. Use pan 1. to evaluate E when t : 0