a$)$ A process has six different resources and three types of flow units, how many rows will there be in the demand matrix? How many columns? $(5$ points$)$

b$)$ After constructing the workload matrix for a process and comparing the total workloads demanded of each resource to the capacity available at that resource, you get the following implied utilizations:

Resource $1=89\%,$ Resource $2=105\%,$ Resource $3=122\%,$ Resource $4=100\%.$

Which resource in this process is the bottleneck? $(5$ points$)$