pls solve it in matlab thanks

4. Use for-end loop to calculate numerical equation Write a program in a script file named PBTask3p4.m to calculate the sum of the first n terms of the series: The program asks the user to enter the number of n in command window; and then display the result in command window. Run the script file for n 4 and n 20, respectively, and show the result in the command window like the following format: >PBTask3p4 The result for n = 8 is 1.322298. 5. Use while-end, if-end, break commands to solve the numerical problem Write a script file named PBTask3p5.m that sums a sequence of random numbers (use randn) until the sum is greater than 10. If the random number generated is greater than 3, exit the loop immediately without doing the sum. Display the sum of the random numbers and the last random number generated in command window when the program terminates. The display format may like this: >>PBTask3p5 The sum of the random numbers is 10.571232 The last random number generated is: 1.618112