•1. Let's create some variables. 

•a. Create a variable called "course" and assign it the value "python". 

•b. Create a variable called "rating" and assign it an integer value (anything you like). 

•c. Print both variables. 

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•2. Let's use Pythagoras theorem to calculate the length of the hypotenuse of a right-angled triangle where the other sides have lengths 3 and 4. 

•a. Create variables called "b" and "c" and assign them the values of the sides with known lengths. 

•b. Write a mathematical express to calculate the length of the hypotenuse (REMEMBER: “a-squared equals b-squared plus c-squared"). (b^2+c^2)^0.5 

•c. Create a variable "a" that equals the result of the calculation. 

•d. Print the value of variable "a". 

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•3. Let's take a look at some data types. 

•a. Print the data type of each of the variables: a, b, c 

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•4. Let's investigate converting between data types. 

•a. Use the "int()" built-in function to convert "a" into an integer type. 

•b. Print the data type of "a" to check it worked. 

•c. Now try running the following line of code: print (a + " squared equals " + b + " squared " + c + " squared." )

•d. You should get an error, do you know why? 

•e. Try using the built-in "str()" (convert to string) function to fix the error.