in matlab, please quickly!

Construct the following matrices: A= 10 random real numbers between -20 and 20 10 integer real numbers between -20 and 20 10 equally spaced numbers between -20 ans 20 L10 equally spaced (in log scale) between 1 and 100 B Sum of the first row of A Sum of the third row of A Aveage of the whole A Max value of the whole A The last three elements on the first row of A The first three elements on the third row of A 2nd, 5th and 7th elements on the fourth row of A The first three elements of B