请阅读下面这张Markdown格式的表格并回答问题。同一行中不同列的单元格用'|'分隔，不同行的单元格用'
'分隔。

表格标题:
表7；电容行业--存货周转天数-算数平均/天 
表格:
| 公司 | 2016Q1 | 2016Q2 | 2016Q3 | 2016Q4 | 2017Q1 | 2017Q2 | 2017Q3 | 2017Q4 | 2018Q1 | 2018Q2 | 2018Q3 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| MURATA | 103.77 | 108.18 | 109.4 | 111.09 | 111.33 | 111.99 | 117.87 | 102.3 | 98.71 | 100.33 | 106.27 |
| TAIYO | 95.98 | 99.7 | 97.17 | 99.52 | 99.17 | 104.69 | 100.1 | 99.93 | 101.06 | 111.77 | 106.87 |
| TDK | 67.85 | 70.48 | 69.98 | 67.67 | 66.44 | 71.63 | 72.03 | 72.5 | 71.0 | 78.41 | 79.57 |
| 三星电机 | 55.17 | 54.63 | 51.42 | 55.06 | 56.25 | 56.47 | 52.59 | 58.68 | 55.67 | 60.65 | 58.5 |
| Kemet | 107.31 | 106.42 | 106.06 | 102.97 | 99.76 | 77.53 | 75.33 | 74.81 | 73.79 | 79.32 | 82.74 |
| 风华高科 | 97.65 | 91.01 | 90.2 | 76.87 | 91.34 | 76.81 | 80.28 | 67.11 | 81.26 | 70.87 | 67.26 |
问题:
总共有多少个电容公司2017Q1大于50并且2017Q2大于50的？
Answer:
6