Determine the domain and the range of the function. \[ f=\{(11,8),(21,-1),(32,8),(50,1)\} \] The domain is $\{\square\}$. (Use a comma to separate answers as needed.)

Step 1 ：The domain of a function is the set of all possible input values which will produce a valid output from a particular function.

Step 2 ：In this case, the domain of the function f is the set of all first elements in each pair of the function.

Step 3 ：f = [(11, 8), (21, -1), (32, 8), (50, 1)]

Step 4 ：So, the domain is [11, 21, 32, 50]

Step 5 ：Final Answer: The domain of the function is \(\boxed{\{11, 21, 32, 50\}}\)