Dashboard on activities (calls and events) per week or month

Dashboard on activities (calls and events) per week or month

hi,

In Zoho CRM

1/ How can we create dashboard that shows on a graph  the number of events/calls (Y) per week or month (X) ?

In Zoho Invoice

1/ How can we create dashboard that shows on graph the numbers of invoices (and average amount) (Y) per week or month (X) ?

Thanks,