Multi$-$dimensional arrays are commonly stored in row$-$major

order in computer memory. In row$-$major order, the elements of

each row are stored contiguously in memory, and the rows

themselves are stored in a sequential manner. Visualization of

this technique is given in the following figure:

Design and code a Python class, named TwoDimClass, which

contains a float array, and implements row$-$major order to

access individual items. Your class shall include the following

methods:

$$ A constructor, which takes two arguments, namely $M,$ number

of rows, and $N,$ number of columns.

A getter function, getByIndex$(m,n,$ where $m$ is the row

number, and n is the column number.

A setter function, setByIndex$(m,n,$ item$),$ where $m$ is the row

number, and n is the column number.

A row getter function, getByRow$($m$),$ where $m$ is the row

number.

A column getter function, getByColumn$($ n