Let E be a 15 x 15 matrix and suppose matrix E can be written as E = BL where Bis a 15x 13 atax and C is a 13 x 15 matrix a ) Does By = 6, b E R have a unique, more and / or infinitely many solutions for y? List all that apply 6) Does LX = 0 for DE IR have a unique zone andfor many infinitely solutions for a ? Cist all that apply. () Hence explain whether E is invertible or out. in written essay