I need help with these question ASAP .. I have to get them done tonight because it is due tomorrow

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

What was the first instrument to ever record an earthquake?