Java петли я не могу понять

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I have 3 tasks I need to output. (The other comments are instructions to me). The 3 tasks are next to the first 3 asterisks. Can you assist me again please? Here it is:

* a for loop nested inside another for loop
* a while loop
* a do-while loop

*****************************************************************************************/

package prg420week3_codingassignment;

public class PRG420Week3_CodingAssignment {

public static void main(String[] args) {

// The following code should print asterisks: 1 on line 1, 2 asterists on line 2,
// 3 on line 3, 4 on line 4... for as many lines as the variable linesOfAsterisks.
// To do this, we can use 2 nested for loops. The first for loop is coded for you.
// You will need to add another for lop, NESTED INSIDE the first, that prints
// a certain # of asterisks based on the # of times the loop code has been executed.
// The result should look like this:
// *
// **
// ***
// ****
// *****
// etc.
int linesOfAsterisks = 5;
for (int i = 1; i <= linesOfAsterisks; i++) { // for each line...

// LINE 1. ADD A NESTED FOR LOOP THAT DISPLAYS ONE ASTERISK ON LINE 1, TWO ASTERISKS ON LINE 2, 3 ASTERISKS ON LINE 3, ETC.

System.out.println();
}

//////////////////////////////////////////////////////////////////////
// Add a while or do-while loop that displays the numbers from 10 to 1 in that order, like so:
// 10
// 9
// 8
// 7
// ...
// 1
//////////////////////////////////////////////////////////////////////


int num=10;

//LINE 2. ADD A LOOP THAT DISPLAYS NUMBERS 10 TO 1 IN DECREASING ORDER (HINT: DECREMENT OPERATOR)



///////////////////////////////////////////////////////////////////////
// Write a loop that adds 7s one at a time until the sum becomes > 157.
// Then print out both the sum and the number of 7s that were aded.
// Write a while or do-while loop, whichever you think is most appropriate.
//////////////////////////////////////////////////////////////////////////

int sum = 0;
int numberOfSevens = 0;

//LINE 3. ADD ANOTHER LOOP THAT ADDS 7s UNTIL SUM > 157. THEN DISPLAY SUM AND NUMBER OF SEVENS ADDED.

}

Что я уже пробовал:

Я даже не могу начать это. Мне бы не помешала помощь, пожалуйста.

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