In C++. Ex 3 array should be [3][2][2]

Exercise 3 Assign values to a three-dimensional array of size [4][4][3] (x, y, z); the numbers should be in the range of 0...255. Find the mean value (average) of each x, y cell. The result will be a two- dimensional array containing the averages of the three-dimensional array (this is an example of an RGB2Gray conversion) Exercise 4 Use the vector data type from STL (Standard Template Library) to create an empty vector (i.e., do not define a size). Use a range-based for loop to fill in an array of size 5 based on user input. Use a range-based for loop to copy numbers from the array to the empty vector. Print the contents of the vector and save them in a file Exercise 5 Get two input values from the user, one int and one float. Use two overloaded functions called absoluteValue to return the absolute value passed using a ternary operator. Print the results in main function Exercise 3 Assign values to a three-dimensional array of size [4][4][3] (x, y, z); the numbers should be in the range of 0...255. Find the mean value (average) of each x, y cell. The result will be a two- dimensional array containing the averages of the three-dimensional array (this is an example of an RGB2Gray conversion) Exercise 4 Use the vector data type from STL (Standard Template Library) to create an empty vector (i.e., do not define a size). Use a range-based for loop to fill in an array of size 5 based on user input. Use a range-based for loop to copy numbers from the array to the empty vector. Print the contents of the vector and save them in a file Exercise 5 Get two input values from the user, one int and one float. Use two overloaded functions called absoluteValue to return the absolute value passed using a ternary operator. Print the results in main function