Problem 1: dealing with numbers

Write a Python program that reads from standard input the amount of a restaurant bill and outputs two options for tipping, one based on 15% of the bill, the other based on 20% of the bill.

Problem 2: dealing with strings

Write a Python program that:

  • Reads a sentence from standard input
  • Writes this sentence on standard output all in lower case
  • Writes this sentence on standard output with all vowels in upper case and all consonants in lower case
  • Writes the sentence backwards

Problem 3: Counting words and characters

Write a Python program that:

  • Reads a sentence from standard input
  • Counts the number of words and the number of characters, not including space

For this problem, you will probably need the function len(): len(string) gives the length of string.

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