Rewrite the following for loop by using while and do-while loops:

int p = 20;
for(k=p;k>=0;k-=2)
{
    s += k;
}
System.out.println("Sum="+s);

Rewrite the following for loop by using while and do-while loops:

int a=37, b, c=0;
for(b=1;b<=a;b++)
{
    if (a % b == 0)
        c = c + 1;
}
if(c == 2)
    System.out.println(a + " is a prime number"); 
else
    System.out.println(a + " is not a prime number");

Rewrite the following using for loop:

a=1;
while(a<=5)
{b = 1;
while(b<=a)
{ 
System.out.print(b);
b++;
} 
System.out.println();
a++;
}

State the final value of q at the end of the following program segment after execution. Show the dry run.

for(m=2;m<=3;++m)
{
for(n=1;n<=m;++n)
{
p=m+n-1;
if(p%3 == 0)
q += p;
else
q += p+4;
}
}