a) Write a Python program to get the top three meats (sold out) in a shop. Sample data: {'chicken': 45.50, 'beef':35, 'pork': 41.30, 'fish':55, 'shrimp': 25, 'sausage': 32, 'ham': 16}

b)The dataset mtcars has been widely used for studying data analysis. For the dataset mtcars, write a R program to calculate the maximum value, minimum value, and average value of mpg (miles per gallon) of all 32 cars in the dataset mtcars.