Answer :
The following line of Matlab code can create a 4x20 matrix in which all the elements are initialized with zeros: `A = zeros(4,20);`
In Matlab, we can create a matrix of a specific size using the `zeros()` function. The function takes two arguments: the number of rows and the number of columns. When the function is called with these arguments, it creates a matrix of the specified size with all the elements initialized to zero.In this case, we want to create a 4x20 matrix.
Therefore, we call the `zeros()` function with arguments `4` and `20`, as follows: `A = zeros(4,20);`. The resulting matrix `A` will have 4 rows and 20 columns, with all the elements initialized to zero.
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