Write a function waterVis that accepts zero, one or two inputs. The function should use the equation below to estimate the viscosity of water in centipoise and return that value as the output.

=0.0168T^-0.88

The inputs to the function will be

(optional) - density. If not provided as an input use 998.2

T (optional) - temperature. If not provided as an input use 30

Hint: If there are no inputs, = 998.2 and T = 30. If there is one input, = first input and T = 30. If there are two inputs, = first input and T = second input.