$1.$ The angle of attack required for steady, straight and level flight at a mass of $35\mathrm{.}0$ tonnes and $150$ kts EAS for three cases: $($i$)$ aircraft in clean condition, and with flaps in the $($ii$)$ take$-$off and $($iii$)$ landing positions.

$2.$ The power required from the engines, expressed as a percentage of the maximum engine power, for the aircraft to maintain straight and level flight at a mass of $35\mathrm{.}0$ tonnes and $150$ kts EAS at sea$-$level in three configurations: $($i$)$ clean, $($ii$)$ take$-$off flaps$/$undercarriage up and $($iii$)$ landing flaps$/$undercarriage down.