Find a system of linear equations that has the given solution. (There are many correct answers. Enter your answers as a comma-separated list. Parametrize answers in terms of variables x, y, and z.)
a) 2x+3y−z=5, 4x+5y+2z=11, x+2y+3z=7
b) x+2y−z=3, 3x+4y+2z=8, 2x+3y+5z=11
c) 2x+y+3z=6, 3x+2y+z=7, x+4y−2z=5
d) x+3y+z=4, 2x+5y−z=8, 3x+2y+2z=10