What are logical and physical text styles ?

How can different tags be combined in HTML ? What is its use ?

Write the HTML code for the following to appear one after the other :

• A small heading with the words, "We are Proud to Present"
• A horizontal rule across the page
• A large heading with the one word, "Orbit"
• A medium-sized heading with the words, "The Geometric Juggler"
• Another horizontal rule

Insert the appropriate line break and paragraph break tags to format the following poems with a blank line between them :

A Morning is a Wonderful Blessing, 
Either Cloudy or Sunny 
It stands for Hope, giving us another 
Start of what we call Life.