please answer fast

An ISP is granted a block of addresses to the organization starting with 182.165.0.0. The organization has four groups. So, the ISP needs to assign these addresses to each groups of customers as follows: 1. 1st group has 128 customers each needs 128 addresses group has 64 customers each needs 256 addresses 3. 3rd group has 32 customers each needs 64 addresses 4. 4th group has 32 customers each needs 32 addresses Design the sub-block and give the 'n notation for each sub-block. Find out how many addresses are still available after these allocations. 2. 2nd