Which function is used to show legends ?

1. display()
2. show()
3. legend()
4. legends()

Which argument must be set with plotting functions for legend() to display the legends ?

1. data
2. label
3. name
4. sequence

Which argument in hist() is used to create a stacked bar type histogram ?

1. histt
2. histtype
3. type
4. barstacked

Which of the following functions can plot only one data series ?

1. plot()
2. bar()
3. boxplot()
4. pie()