i need some help with question 1 to 7 using matlab

1. Show a random 4*9 matrix and a random 8*5 matrix. 2. Use ":" to sum up all elements in the 2nd row of the 4*9 matrix. 3. Use ";" to sum up all elements in the 3rd column of the 8*5 matrix. 4. Create a function named "summation". The function will add up all elements in the matrix. 5. Create a random 7*6 matrix and show it. Use the created "summation" function to obtain the sum up value of all elements of this random 7*6 matrix, show your result. 6. Use ":" to sum up the elements in each row of the 7* 6 matrix separately, and show the 7 results. 7. Then, add up the seven values. Check if the result is the same as 05. Please answer Q1 to 27 and show matrices, calculation and matlab codes for each