Help with rotation any single matrix of 3D matrix by 90 degrees

Suppose, I have 3D matrix of A = rand(5,4,3) and i want to rotate clockwise only 1st matrix with 90 degree and then change the values of 1st row of the rotated matrix with random values?

Answer 1

[madhan ravi]

A = rand(5,4,3);
A1=rot90(A(:,:,1))          %first page matrix rotated 90 degrees
A1(1,:)=rand(1,size(A,1))   %first row inserted with random values

[Muniba Shah]

Thank you Sir!