Which of the following is/are a count variables? Number of astronomical units (1 AU is 93 million miles, the distance between the earth and the center of the sur Cost of transportation to the planet Mars (in dollars) [v2] Prototype of craft created by SpaceX (typically named in the chronological order in which they were created) [v3 Type of radiation in the Van Allen radiation belt (x-rays vs gamma rays, etc.) [v9] Amount of G's (g-forces) experienced by astronauts upon launch (1 G is amount of force experienced in Earth's gravitational field, measured in Newtons or kg m/s [v4] Amount of heat energy generated upon re-entry of spacecraft into the Earth's atmosphere, measured in degrees [V5] Oxygen carrying capacity (volume) of the new SpaceX spacesuit[v6] Type of scientist working on the Spacex team[v7] Speed of light [v8] Force of acceleration (G's) experienced in the moon's gravitational field [v10] Mineral type found in rocks on the planet Mars [v11] Number of scientists working on the SpaceX team [v12] Speed of light Prototype of craft created by Spacex Force of acceleration (G's) experienced in the moon's gravitational field