TRISB $=0$;

PORTB $=0$b$00011100$;

How the above code works?

Your answer:

Set Port B as Output. Set $2.3.$ and $4.$ bits High

Set Port B as Output. Set $1.5.$ and $6.$ bits High

Set Port B as Output. Set $2.3.$ and $4.$ bits Low

Set Port B as Output. Set all bits High