can someone please tell me whether all the subtopics under the topic SPHERICAL MIRRORS in ray optics (physics class 12) are completely deleted? That includes the image formation stuff, the mirror formula derivation and all, magnification, right?

Orque can be calculated by multiplying the force (n) applied at 90∘ to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n⋅m. if the force (at 90∘ to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?