please help lol- brainlist to whomever- P. S---> Do it all please, and don't get any wrong. Then you get brainiist.

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat