Please help me with the proof, thanks!

Exercise 3. Let. V and W be nite dimensional vector spaces (with dimV 96 l) and dim W at 0} and T E (V, W) Suppose that. there are bases 1:1,...,11n of V and 191,. . .,w,,. for W such that. M(T) with respect to thwc hams contains only the values 2021, i.c., 2021 - - - 2021 N10") = . E 2021 - - - 2021 Prove that dim Null(T) = dim V l