can any one help \nQ1. ![image](https://assets.leetcode.com/users/images/353bf763-1f58-429f-ac1c-efb0c44d92de_1597300015.0007756.png)\n\n![image](https://assets.leetcode.com/users/images/7e0a3335-d177-4df0-993c-16452bda68ea_1597300030.6408205.png)\n\nQ2\n\n![image](https://assets.leetcode.com/users/images/e9cf72f2-278a-4733-8764-d8f72651004f_1597300416.7779799.png)\n\n\n![image](https://assets.leetcode.com/users/images/6186d2e3-686b-4bc9-adc9-0e3fa57999d8_1597300427.1097488.png)\n\n![image](https://assets.leetcode.com/users/images/c1618334-0c7a-458f-b454-a1a915ad264a_1597300443.6494522.png)\n\n![image](https://assets.leetcode.com/users/images/8c747f8c-e70f-4a4d-a4b7-5b178c176ad8_1597300454.9752018.png)\n\n\n![image](https://assets.leetcode.com/users/images/09162b36-7805-4308-94dc-93ec5fc9c665_1597300472.1771524.png)\n

can any one help \nQ1. \n\n\n\nQ2\n\n\n\n\n\n\n\n\n\n\n\n\n