When we talk about electromagnetic energy, what parameter is used to describe it if it represents energy (a) that does not change in time, (b) that changes at rates in the hearing band, (c) that is in the ultrasonic range, (d) that is in the AM radio band, (e) that is in the VHF television band, (f) that is in the FM radio band, (g) that is in the microwave band, (h) that is in the high range for new 5G networks, (i) that is in the infrared band, (j) that is in the ultraviolet band, (k) that is in the x-ray, beta ray, and cosmic ray band?