How to code a piechart in php using specific data from the following: student table $,$ Bus$1$ table, Bus$2$ table and Bus$3$ table $?$ Please show me in detail step by step.

How to code a linegraph in php using specific data from Bus$1$ table, Bus$2$ table and Bus$3$ table $?$ Please show me in detail step by step.

How to code a statusbar in php using specific data from Bus$1$ table, Bus$2$ table and Bus$3$ table showing available space on each bus? Please show me in detail step by step.

How to code a callender in php$?$ please note that I want a calender to show on my webpage. Please show me step by step.