Problem $3$: This problem will ask about some of the basic characteristics of waves. $($Part $1)$ Which of the following are true about traveling waves? Select all that apply. $($a$)$ Traveling waves are modeled as some sort of disturbance that travels away from its source. $($b$)$ Traveling waves transport energy. $($c$)$ Waves must have an amplitude, wavelength, and frequency. $($d$)$ Waves must exist in a medium. $($Part $2)$ Which of the following are true about all mechanical traveling waves? Select all that apply. $($a$)$ They are created by particles that are disturbed from their equilibrium positions$/$state$.($B$)$ They must have an amplitude, wavelength, and frequency. $($c$)$ They must have intensity. $($d$)$ They transfer energy.