please explain why

Question 2a Complete the line of code to set (to 1) bits 1, 6, 9, and 14 of num1, and preserve the remaining bits. Use hex for constant operands. num1 = numl operator Ox mask ; operator: mask: Question 2b Complete the line of code to test if all bits 2,5, 8, 13 and 15 of num1 are set to 1. Use hex for constant operands. if ((numl operator Ox mask) == Ox value) ... operator: mask: value