Problem that is annoying me:

One of the steeper streets in the US is the 500 block highland drive on queen anne hill in Seattle. To measure the slope of the street, I held a builder's level so that one end touched pavement. The pavement was 14.4 inches below the level at the other end. The level itself was 71 inches long.

a) What angle does the pavement make with the level?

b) A map of Seattle show sthe horizontal length of this block of highland rive is 365 ft. How much longer than 365 feet is the slant distance up this hill.

c) How high does the street vertically rise up in this block?

If anyone could break down the steps of how do these that would be greatly appreciated.

Thanks in advance.