Matlab please help thanks in advance all questions please

7. 3.0) If u=[10, abs(-3.6), 10+20], v=[-1; sqrt(4); round(pi)], x=[u', v], then what is the size of x? A 2x3 B 3x2 1x3 D 3x3 0 [1 If a= 2 b = eye(2,2), then what is the result of 6.* a? -1 A -1 0 0 1 B 3 8 1 0 6 0 -1 D 0 2 2 2 9. 3.0) In MATLAB, which expression is NOT equal to 0 ? A cos(pi/2) B zeros(1,1) sqrt(0) D sin(3*pi/2)^2-1 10. ,3.0) if a = 122 and b= -17, which expression is TRUE? A b B a==b b>= a D a & b