how would i write this in matlab?

3. Write a program that will generate the numbers from 30 to -10 with a step of -5, then the program will use "while loop" to sum the positive numbers generated. Display the sum. Run your program and verify that it operates correctly. Hint: the sum of 30, 25, 20, 15, 10 and 5 is 105. 4. Modify the program of above exercise (exercise 3), use "if, else statement" to sum the positive numbers. Run your program and verify that it operates correctly