Consecutive graphs

[george brida]

hello all,
I would draw four graphs consecutively from top to bottom: the first graph is to plot the function  f (x) = x ^ 2 with x: 1:0.1:5. Headings of x-axis and y-axis are respectively and Del Fel. The title of the graph is Graph number 1.
The second graph is to represent the function f (x) = (x-1 / 2) ^ 2 for even values of x. Headings of x-axis and y-axis are respectively and Del1 Fel1. The title of the graph is Graph number 2.
 The third graph is to represent the function f (x) = (x-1 / 3) ^ 2 for even values of x. Headings of x-axis and y-axis are respectively and Del2 Fel2. The title of the graph is Graph number 3.
Finally,  the fourth graph is to represent the function is f (x) = (x-1 / 4) ^ 2 for even values of x. Headings of x-axis and y-axis respectively and LED3 Fel3. The title of the graph is Graph number 4.
Thank you in advance,
George.