Represent digits '3' in 2D

1. convert data from the UCI Optical Recognition of Handwritten Digits Data Set
2. perform PCA over all digit '3' with 2 components
3. plot the PCA results as below (also in page #12 of PCA)

1. Programming lanuage: python
2. Plot the results in matplotlib
3. Use TensorFlow if possible

Process this data set (include all digits) in Deep Learning methods, and visualize “threes” in the same way.