Please answer all and I'll thumbs up

Select all answers that are true about z-Index. z-Index can only be applied to non-static positioned elements. Both positive and negative integers can be used to set the z-Index property. Elements with larger z-Index values appear on top of the elements with smaller z-Index value. Only positive integers can be used to set the z-Index property. Which of the following media query is true for a viewport width 1000px width? (max-device-width: 600px) (min-width: 600px) (min-device-width: 600px) (max-width: 600px) Refer to the CSS below, what is the body's background color for a browser that is 900px wide? blue red white green 1 point Refer to the CSS below, what is the body's background color for a device that is 400px wide? body \{ background-color: agreen; media sereen and (nin-width: 6 eoppx) f body i background-color: blue; emedia screen and (nin-width: 8800px ) f body f background-color: ared:------ background-color: Gred; enedia sereen and (nin-widtht 100epx)f body f background-cotort background-color: Eunite; blue red white