Given the function

f(x)={5x+9x<05x+18x0\displaystyle {f{{\left({x}\right)}}}={\left\lbrace\begin{array}{cc} {5}{x}+{9}&{x}<{0}\\{5}{x}+{18}&{x}\geq{0}\end{array}\right.}

Calculate the following values:

f(1)=\displaystyle {f{{\left(-{1}\right)}}}=  

f(0)=\displaystyle {f{{\left({0}\right)}}}=  

f(2)=\displaystyle {f{{\left({2}\right)}}}=