QUESTION $1($ show all necessary steps please$)$

Assume that concurrent processes execute on a single processor. Compute the CPU utilization factor for the processes shown below. The processes start at the same time

and their execution time is as follows:

A:$8$ms$,$ B:$25$ms$,$ C:$6$ms$,$ D:$25$ms$,$ E:$10$ms$,$ F:$25$ms