Import Demo Theme

I can’t seem to import the demo and I also get the message below:

Please resolve these issues with your server configuration before importing any demo template:

Maximum Execution Time (max_execution_time) : 30 seconds. Recommended max_execution_time should be at least 400 Seconds.
Maximum Input Time (max_input_time) : 60 seconds. max_input_time should be at least 300 Seconds.
WordPress Memory Limit (WP_MEMORY_LIMIT) : 40M memory limit should be at least 64MB. Please refer to : Increasing memory allocated to PHP for more information

Can you help with this?

– Boris