Given the function
f(x)={7x+8x<07x+16x0\displaystyle {f{{\left({x}\right)}}}={\left\lbrace\begin{array}{cc} {7}{x}+{8}&{x}<{0}\\{7}{x}+{16}&{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)}}}=