$A$ student constructed a box-type solar cooker. He found that it did not work efficiently. Give any four possible mistakes in the construction and operation of the solar cooker.

(N/A) The student may have made the following mistakes in the construction or operation of the solar cooker:
$(i)$ Not using a black-painted surface inside the box to absorb heat radiation.
$(ii)$ Using a plastic sheet instead of a glass sheet,which fails to trap heat effectively due to the greenhouse effect.
$(iii)$ Not using a plane mirror reflector to direct additional sunlight into the box.
$(iv)$ Using a non-black or reflective cooking vessel,which reduces the absorption of heat radiation.