The objective of the game is to place a skyscraper in each square, with a height from 1 to 5, so that no two skyscrapers in the row have the same height. Also, the number of visible skyscrapers, as viewed from the direction of each clue, is equal to the value of the clue. In the example below, looking up from the left 4 skyscrapers are visible: #2, #3, #4, and #5. #1 is blocked by #3. Looking up from the right only one skyscraper is visible. #5 blocks all the others. Therefore the clue on the left would be 4 and the clue on the right would be 1.

Given the numbers (1, 2), what are the number of skyscraper combinations are there?

Please show the steps. I will mark brainliest only to the answer with proper steps.

(if you need some clarifications, please ask me them)