Order of levels

I want to create a factor of data representing 3 categories: L = low, M = medium, H = high
First I must make a vector with values: H H M L H H M L M H L M L L
Which line of code will create the vector?

When I make a factor like this:

> v <- c(“H”,”H”,”M”,”L”,”H”,”H”,”M”,”L”,”M”,”H”,”L”,”M”,”L”,”L”)
> F <- factor(v)

What is the order in which the categories will be plotted?

I want to create an ordered factor and plot the categories a follows: L  M  H

Which line of code do I need for that?

In what order will these categories be plotted?

> v <- c(1,4,4,4,3,5,4,4,5,3,2,5,4,3,1,3,1,5,3,4)
> F <- factor(v)

Suppose I want to plot the categories like this: 5  4  3  2  1

In what order will these categories be plotted?

> v <- c(1,4,4,4,3,5,4,4,5,3,2,5,4,3,1,3,1,5,3,4)
Which line of code do I need for that?