MySQL SELECT from two tables with COUNT -

i have 2 tables below:

table 1 "customer"   fields   "cust_id", "first_name",  "last_name"    (10 customers) table 2 "cust_order" fields   "order_id", "cust_id",                   (26 orders) 

i need display "cust_id" "first_name" "last_name" "order_id"

to need count of order_id group cust_id list total number of orders placed each customer.

i running below query, however, counting 26 orders , applying 26 orders each of customer.

select count(order_id), cus.cust_id, cus.first_name, cus.last_name cust_order, customer cus group cust_id; 

could please suggest/advice wrong in query?

you try one:

select count(cus_order.order_id), cus.cust_id, cus.first_name, cus.last_name  cust_order cus_order, customer cus  cus_order.cust_id = cus.cust_id group cust_id;