user: I need to calculate the average of the numbers 1, 3, 4, 6, and 8. Once that's done, could you also find me the geographical coordinates for Cupertino, the city where Apple's headquarters are located?

Available functions:
name: calculate_mean
description: Calculates the mean of a list of numbers.
parameters: type: dict
properties: numbers: type: array
items: type: float
description: The list of numbers.
required: numbers
name: get_stock_history
description: Finds the price of a stock by its stock name.
parameters: type: dict
properties: stock_name: type: string
description: The stock name of the product, in the format of the stock symbol.
interval: type: string
description: The interval of the stock history. Allows one of following : 5m|15m|30m|1h|1d|1wk|1mo|3mo
diffandsplits: type: string
description: The diff and splits of the stock history. Allows one of following : true|false. Default to false
required: stock_name
interval
name: get_coordinates_from_city
description: Fetches the latitude and longitude of a given city name using the Maps.co Geocoding API.
parameters: type: dict
properties: city_name: type: string
description: The name of the city, such as 'Rome'.
required: city_name