1. Let X ={M, A,T, II). Which of the following topologies make X a connected space? (a) {o, {M} {A,T, In}X} (b) (0, {A} {M, A} {A, T} {M, A, T), X} (c) {o, {M), {M, A} {M, A, T), X} (d) P(X ) 2. Which of the following subspaces of R is disconnected, relative to the standard topology? (a) {razzo} (b) (xx'+1>0) (c)(x(2-1 > 0}