How many electrons can fit in the orbital for which n=3 and  I=1

n= 3, l= 1 is 3p orbital; any orbital can accommodate a maximum of 2 electrons.

(2) p- subshell contains 3 orbitals px, py, pz and maximum number of electrons accommodated is 3x2=6
(3) d- subshell contains 5 orbitals d_xy, $d_{y{z}^{\mathrm{\prime }}}{d}_{x{z}^{\mathrm{\prime }}}{d}_{x^2-y^2},d_{z^2}$ and each orbital can accommodate 2 electrons, maximum number of electrons that can be accommodated in d-subshell=2x5=10
(4) f- subshell contains 7 orbitals and each orbital can accommodate 2 electrons, maximum number of electrons that can be accommodated in f- subshell =7x2=14