Create a new function called midFibRatio$($n$)$ that returns r from simpleFibRatio$()$ if no error occurs, but returns np$.$nan for the error raised by simpleFibRatio$($n$=1)($error from Question $1\mathrm{.}2).$

Test your midFibRatio$()$ function for n $=18$ and then n $=1.$ Assign the output to q$1\_3.$ Feel free to try it for other inputs.

Examples: $>>>$ midFibRatio$(2)1\mathrm{.}0$