[{"itemType":"task","number":"1","published_number":"1","title":" 4.devlopment of mathmatical modelfinal","result":"","resultStatus":"","lock":false,"status":"published","taskId":"101666","isOptional":"0","type":"video","isTaskFree":"0","watchLimitRemaining":false,"replayStatus":"","activityStartTimeStr":"","activityStartTime":"","activityLength":"52:50","activityEndTime":"","fileStorage":"cloud","isTaskTryLookable":0,"isSingleTaskLesson":true}]