Yusef is going to watch a football match in the park.

He will catch a bus and then a train.

It takes Yusef $10$ minutes to walk from his home to the Statue bus stop.

The walk from Park Station to the football pitch takes $15$ minutes.

The match starts at $4pm.$

Here are the bus and train timetables.

Bus timetable

$\backslash$table$[[$Statue$,1335,1350,1405,1420,1435],[$Hospital$,1355,1410,1425,1440,1455],[$Lake$,1411,1426,1441,1456,1511],[$Main Station,$1427,1438,1453,1512,1527]]$

Train timetable

$\backslash$table$[[$Main Station,$1400,1430,1500,1530],[$Park Station,$1425,1455,1525,1555]]$

a What is the latest time Yusef can leave home?

b Which bus and train should he catch?