Need explanation and solution only for #5, 6, 7.

Problem 1. Assume that we are using a hard disk with the following characteristics: Capacity 30 GB Average seek time 6 msec * .Spindle speed 15,000 rpm Bytes per sector 512 Sectors per cluster 8 Sectors per track 400. Assume that we have a file of 20, 000 records. Each record has 128 bytes. Answer the following questions 1. How much is the average rotational delay? 2. How many records can be stored in one sector? 3. How many clusters are needed for the file? 4. How much is the time for reading one track, including the seek time, the average rotational 5. Assuming contiguous storage, namely the records are stored in clusters from the same track 6. Assuming the minimal transfer unit is one cluster, how much is the time for reading one 7. Assuming random storage of the records and every record is stored in a different cluster, delay, and the transfer time? as long as possible, how much is the total time for reading the whole file? cluster, including the seek time, the average rotational delay, and the transfer time? reading a cluster will include the seek time, the average rotational delay, and the transfer time for that cluster, how much is the total time for reading the whole file