Write a function that calculates the frequency of elements in a given vector and displays a histogram using a for loop. $(30$ Points$)$

Define a vector of integers $($you can choose any values$).$

Use a for loop to count the frequency of each unique element in the vector.

Store the results in a separate vector for frequencies.

Use the bar function to create a histogram based on the unique elements and their corresponding frequencies.

Example:

Input Vector: $[3,5,2,3,2,8,5,5,2]$

Output:

Unique Elements: $[2,3,5,8]$

Frequencies: $[3,2,3,1]$

A bar histogram displaying the frequencies of the unique elements.