Given the functions below, determine all the points where the function given is continuous.

1.) f(x,y,z) = (x^3)/(y) + sin(z)

2.) Note: this function is a piecewise function:

Also note that =! means "does not equal"Code:`f(x,y) = cos(1/(x^2 + y^2)), if (x,y) =! (0,0)`

1, if (x,y) = (0,0)

Any help would be appreciated.