The function f(x)\displaystyle {f{{\left({x}\right)}}} has a domain of all real numbers, is periodic and has a period of p=20\displaystyle {p}={20}. The graph of one complete period is shown below.
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Find the following values:
f(14)=\displaystyle {f{{\left({14}\right)}}}=  
f(33)=\displaystyle {f{{\left({33}\right)}}}=  
f(481)=\displaystyle {f{{\left({481}\right)}}}=