A new poll asked Americans if they think they could replicate famous works of art . . . if they were given all the necessary materials and had enough free time.   9% of people said they “definitely” or “probably” could replicate Michelangelo’s 500-year-old “David” sculpture.  For people ages 18 to 29,  21% think they could do it.  Among Boomers, it was just 1%.    Coincidentally, a principal in Florida had to resign last month after students were shown “David” in art class . . . and parents complained that it was “pornographic.”   “David” was the one we have the least confidence in doing.  MORE Americans believe they could replicate:  Vincent Van Gogh’s “Self-Portrait with a Straw Hat” . . . Paul Cezanne’s “The Basket of Apples” . . . and Piet Mondrian’s “Composition with Red, Yellow, and Blue.”