please solve part B

Tinto A restaurant seconds the amount of time customers wat des table en Saludy weringe. The file is a right at tegnef wat times for the last 100 euren Complete puta) TY Number of minutes Customer Oso under 10 100 de 20 20 ta under 10 So todo 40 ton 0 10 under 11 10 18 a Calcute approximate rage wat lime per customer the prema rage wat time per customers Round to one decimal places needed) by Calculate the apprenance and standard deviation of the watime percutomer The approximate verance of the wat time per customer is Round to two decimal places as needed